A Guide to Every Advertising Channel | Ad-Diversity

Every business needs to advertise. But knowing where to start, which channels to use, and how to make your budget work hardest can feel overwhelming, especially when most of the advice out there comes from companies trying to sell you their own platform.

We are a media planning and buying agency. We are not tied to any single media owner or platform, which means we can give you an honest view of what each advertising channel does well, who it works for, and when to use it.

This guide covers every major advertising channel available to UK businesses. Whether you are spending a few hundred pounds on a local bus campaign or planning a national TV push, the principles are the same: know your audience, choose the right channel, and make every pound count.

Outdoor advertising

Outdoor advertising (also known as out-of-home or OOH) is any advertising that reaches people while they are outside their home. It includes billboards, bus advertising, taxi advertising, rail and underground advertising, airport advertising, street furniture like bus shelters and phone kiosks, and digital billboard screens.

Outdoor advertising is one of the most effective ways to build brand awareness. It delivers high frequency, meaning people see your ad repeatedly as they travel the same routes. It is particularly strong for reaching local audiences in specific areas, postcodes, or even individual streets.

Who is it best for?

Businesses that need broad awareness, local reach, or high-impact visibility. It works across almost every sector from retail and leisure to healthcare and financial services.

What should you know?

Outdoor campaigns are typically booked in two-week cycles, though this varies by format. You will need creative artwork supplied to specific dimensions for each format. Costs vary significantly depending on the format, location, and duration. A local bus campaign can start from a few hundred pounds, while a premium London billboard will cost considerably more.

Digital billboard advertising

Digital billboards are the digital version of traditional outdoor advertising. They include digital 48-sheets, 96-sheets, D6 panels, digital bus shelters, and large format urban screens.

The key advantage of digital over traditional outdoor is flexibility. You can change your creative during a campaign, schedule different messages for different times of day, and in some cases buy programmatically, meaning your ad is served based on data triggers like weather, time, or audience footfall.

Who is it best for?

Businesses that want the impact of outdoor advertising with the flexibility to adapt their message. Also well suited to campaigns that need to react quickly or run across multiple locations with different creative.

What should you know?

Digital outdoor is typically sold on a share of voice basis, meaning your ad rotates with other advertisers on the same screen. This brings the cost down compared to owning a traditional site outright but means your ad is not on screen 100% of the time.

Digital display advertising

Digital display advertising is online advertising delivered through banner ads, native ads, and video placements across websites, apps, and social platforms. It includes programmatic advertising, where ads are bought and placed automatically using data to reach specific audiences.

This is one of the most measurable advertising channels available. You can target by demographics, interests, behaviour, location, and even retarget people who have already visited your website. Every impression, click, and conversion is tracked.

Who is it best for?

Businesses that want precision targeting and clear performance data. It works at every budget level and is particularly effective for driving website traffic, generating leads, and retargeting warm audiences.

What should you know?

Digital display can be highly cost-effective but it requires proper setup and ongoing optimisation to deliver results. Without the right targeting and creative, it is easy to waste budget on impressions that do not convert. Working with an experienced media buyer makes a significant difference to performance.

Radio advertising

Radio advertising reaches people through commercial, community, and ethnic radio stations across the UK. It covers everything from national stations like Heart and TalkSport to community stations serving specific towns, cities, and cultural communities like Lyca Radio and Sunrise.

Radio is a trusted, habitual medium. People listen to the same stations at the same times every day, which means your ad reaches a predictable, engaged audience with high frequency. It is also one of the more affordable broadcast channels, making it accessible to businesses that might assume broadcast advertising is out of reach.

Who is it best for?

Businesses that want to build brand awareness through repeated exposure to a loyal, habitual audience. Particularly effective for local and regional campaigns, and for reaching ethnic and multicultural communities through specialist stations.

What should you know?

You will need a produced radio ad (typically 30 seconds). Production can be arranged through your media agency or a specialist production house. Radio campaigns are most effective when they run consistently over a period of weeks rather than as a one-off burst.

Digital audio advertising

Digital audio advertising is audio advertising delivered through streaming platforms like Spotify, through the Digital Audio Exchange (DAX), and through smart speakers and connected devices.

Unlike radio, digital audio ads are served to individual listeners based on data including age, gender, interests, location, and listening behaviour. The ads are typically unskippable with completion rates above 90%, meaning your message is heard in full.

Who is it best for?

Businesses that want the intimacy and engagement of audio advertising with the targeting precision of digital. It works well alongside radio campaigns to extend reach into on-demand and streaming audiences.

What should you know?

Digital audio is growing rapidly. As more people shift from traditional radio to streaming platforms and podcasts, the opportunity to reach them through targeted audio ads is increasing. Most digital audio campaigns can be set up and live within days.

Podcast advertising

Podcast advertising places your message within podcast episodes, either as a host-read endorsement, a pre-recorded ad placed before, during or after the episode, or through programmatic insertion.

The standout feature of podcast advertising is trust. When a podcast host reads your ad in their own voice, it carries the weight of a personal recommendation. Podcast listeners tend to be highly engaged and attentive, with strong recall of the brands advertised on the shows they follow.

Who is it best for?

Businesses that want to reach an engaged, attentive audience in an environment with high trust and low ad clutter. It is particularly effective for products and services that benefit from explanation or endorsement.

What should you know?

Host-read ads typically cost more than pre-recorded spots but deliver stronger engagement and recall. Programmatic podcast advertising allows you to place ads across multiple shows at scale, targeting listeners by interest, demographics, or behaviour without needing to negotiate with individual podcasters.

TV advertising

TV advertising covers traditional broadcast TV across networks like ITV, Channel 4, Channel 5, and Sky, as well as regional TV, direct response TV (DRTV), programme sponsorship, and advertising on ethnic TV channels like Zee TV and Colors.

TV remains the most powerful channel for building mass awareness and brand trust. Seeing a brand on TV gives it an authority and credibility that is difficult to replicate through other channels. It is also more accessible than many businesses realise, with regional TV and DRTV offering routes in at a fraction of the cost of a national peak-time campaign.

Who is it best for?

Businesses that want to build brand awareness and trust at scale. TV works for product launches, brand repositioning, seasonal campaigns, and direct response. Regional and ethnic TV options make it accessible to businesses with smaller budgets or niche audiences.

What should you know?

You will need a produced TV advert, which is a separate cost from the media buy. TV advertising is sold by time slot, day of week, and channel, with peak-time slots (during popular programmes) costing significantly more than daytime or late-night. A good media buyer will find the right balance between reach and cost.

Video advertising

Video advertising is online video delivered across platforms including YouTube, broadcaster video on demand (BVOD) services like ITVX and Channel 4 streaming, connected TV, and outstream video that plays within editorial content on websites.

Video gives you the impact of TV advertising without the broadcast budget. It is highly targetable, measurable, and increasingly consumed on mobile devices and smart TVs. As viewing habits continue to shift away from linear TV and towards on-demand and streaming, video advertising is where a growing share of audiences can be found.

Who is it best for?

Businesses that want the impact of moving image advertising with precise targeting and clear performance data. It works at a wide range of budgets and is particularly effective for reaching younger audiences who consume less traditional TV.

What should you know?

You will need video creative, but it does not need to be the same production quality as a TV advert. Shorter formats (6, 15, or 20 seconds) often perform better than longer ads in digital environments. BVOD advertising benefits from the brand safety and trust of a broadcast environment while offering digital targeting capabilities.

AI and conversational advertising

This is the newest advertising channel available to UK businesses. OpenAI launched ads in ChatGPT in the UK on 6th June 2026, making Britain the first European market to get access.

Sponsored placements appear below ChatGPT’s response when users on the Free and Go plans ask questions. The ads are clearly labelled as sponsored and do not influence what ChatGPT says in its answer.

What makes this different from every other digital channel is how targeting works. There are no keywords to bid on. Instead, ads are matched to the context of the conversation. If someone is asking ChatGPT about planning an advertising campaign, a relevant ad can appear at exactly that moment. It is intent-based targeting at the conversation level, reaching people in the middle of making a decision rather than passively scrolling past a banner.

The model is pay per click, so your budget only gets spent when someone engages. With hundreds of millions of people using ChatGPT every month for research, comparison, and buying decisions, this is a channel worth exploring, particularly for businesses where the purchase decision involves research before commitment.

OpenAI’s self-serve Ads Manager is now available in the UK through ads.openai.com. It is still in beta and the reporting and targeting tools are evolving, but for businesses that want to be early, the opportunity is there now.

We plan and buy ChatGPT advertising as part of a wider media campaign. If you want to understand how conversational AI advertising could work alongside your outdoor, digital, radio, or TV activity, get in touch and we will build it into your media plan.

How to choose the right channel

There is no single best advertising channel. The right choice depends on who you need to reach, what you want them to do, and how much you have to spend.

If you need broad awareness in a specific area, outdoor advertising will reach more people for less. If you need to drive website traffic and track every click, digital display gives you the data. If you want to build trust and credibility, TV and podcast advertising carry weight that other channels struggle to match. If you need to reach a specific ethnic or multicultural audience, specialist radio and targeted digital channels offer precision that mainstream campaigns cannot.

Most effective campaigns combine multiple channels. A billboard campaign supported by digital display retargeting. A radio campaign extended through digital audio on Spotify. A TV campaign driving viewers to a landing page tracked through programmatic display. The channels work harder when they work together.

That is where working with a media planning and buying agency adds value. We look at your audience, your objectives, and your budget, then build a plan across the channels that will deliver the best results. Because we are not a media owner, we have no reason to push one channel over another. We plan around what works for you.

Get in touch

If you are thinking about advertising your business and want to understand which channels would work best, get in touch. We will talk through your objectives and put together a plan that fits your audience and your budget.