Last Updated: 08/08/2026
UK digital ad spend passed £40 billion in 2025 and is forecast to hit around £45 billion by 2026, according to IAB UK’s HY 2025 Digital Adspend Report.
That is roughly 10 percent year on year growth, at a time when a lot of other sectors are barely moving. The short answer to why the digital marketing industry is growing is this. More people are online for longer, mobile has become the default way people browse and buy, and AI tools are making campaigns cheaper to run and easier to measure. If you run a business in the UK, this isn’t background noise. It changes where your next customer is likely to find you.
This article walks through what’s behind that growth, where the money is actually going, and what it means if you’re trying to grow your own business through SEO services or paid channels. We’ll also look at where things get harder, because growth in the industry doesn’t automatically mean growth for your business. You still have to compete for attention in a busier market.
The headline numbers
Here’s a snapshot of where UK digital ad spend sat in the first half of 2025, based on IAB UK’s figures.
| Channel | H1 2025 spend | Share of digital spend |
| Search | £8.3bn | 44% |
| Video (including CTV) | £4.3bn | 23% |
| Display | £2.9bn | 16% |
| Online retail media | £1.5bn | 8% |
| Other (gaming, DOOH, classifieds, audio) | £1.7bn | 9% |
Search still leads by a wide margin, which is why so many businesses keep investing in both organic rankings and paid search. Mobile now accounts for 71 percent of all UK digital ad spend, and that figure alone tells you a lot about where the growth is coming from.
Why the industry keeps growing
People are online more than ever
Ofcom’s Online Nation 2025 report found that 95 percent of UK adults have internet access at home, and the average adult now spends four and a half hours online every day, excluding work. Younger adults spend even longer, over six hours a day for the 18 to 24 age group. Most of that time happens on a smartphone. That’s the simplest explanation for why digital marketing keeps growing. The audience hasn’t just moved online, it lives there for a large chunk of the day.
This matters practically. If your business still treats its website as a brochure and your social channels as an afterthought, you’re competing for attention with platforms that people check dozens of times a day. Businesses that understand the importance of a consistent social media presence tend to capture more of that attention simply because they show up more often.
Consumer behaviour has changed for good
The pandemic pushed a lot of shopping and research online, and that habit stuck. Buyers now research products, compare prices, and read reviews before they ever speak to a salesperson. This is true even in industries that used to rely almost entirely on word of mouth or physical footfall. McKinsey’s research into B2B buying found that digital interactions became roughly 30 percent more common than pre-pandemic levels, and that pattern hasn’t reversed.
What this means in practice is that the businesses winning right now are the ones treating SEO and paid search as complementary rather than picking one over the other. A prospective customer might discover you through an organic blog post, then convert weeks later after seeing a retargeting ad. Neither channel gets full credit on its own, which is part of why measurement has become such a big topic in the industry, something we’ll come back to.
AI is cutting the cost of doing this well
Artificial intelligence has quietly become the biggest operational shift in digital marketing over the past two years. It’s not just about content generation. AI now touches audience targeting on LinkedIn, bid management in PPC accounts, and how quickly a small marketing team can test ideas. Tasks that used to take a strategist a full day, like building audience segments or drafting ten ad variations, can now be done in an afternoon.
This is a big reason smaller UK businesses can now compete with larger ones on digital channels in a way that wasn’t realistic ten years ago. If you’re weighing up whether digital marketing tasks can be automated, the honest answer is that a lot of the mechanical work can be, but strategy, tone of voice, and knowing your customer still need a human hand. Learning to work with these tools, rather than around them, is quickly becoming a basic skill for anyone in the field, which is why guides on how to learn AI marketing get so much search interest.
Where businesses are actually putting the growth to work
Growth in ad spend is one thing. What matters more is where that money goes and why. Here’s a practical breakdown.
Search and content. Organic search still delivers the best long term return for most businesses because you’re not paying per click once you rank. Pairing content with technical SEO work, and keeping an eye on which SEO metrics actually matter, tends to outperform a scattergun approach. Businesses that specialise in a niche often see faster results by working with an agency offering dedicated SEO services rather than trying to cover every keyword themselves.
Pay per click. PPC remains attractive because you only pay when someone clicks, and results are visible almost immediately. If you’re new to the channel, it’s worth reading about common ways businesses make PPC profitable before setting a budget, and comparing Facebook Ads against Google Ads to see which suits your sales cycle. A well run Google Ads agency will usually start with a smaller test budget before scaling spend, which avoids wasting money while the account learns what converts.
Social media. This is where brand awareness and direct response now overlap. Comparing digital marketing against pure social media marketing is useful groundwork if you’re deciding where to focus a limited budget. Platforms like LinkedIn work particularly well for B2B, and a specialist LinkedIn advertising approach can outperform a generic campaign built for consumer audiences. On the consumer side, a dedicated Facebook Ads agency can help with the creative testing that platform now demands, since ad fatigue sets in faster than it used to.
PPC as part of a wider mix. If your budget doesn’t stretch to everything, it helps to know where a strong PPC agency fits alongside organic work, and to look at alternatives to PPC if click costs in your sector have become unaffordable. Getting the basics right, from improving PPC campaign performance to tightening your quality score, usually saves more money than switching channels entirely.
I’ve seen this play out with a client in professional services who assumed PPC was too expensive for their sector. Once we restructured the account around long tail, lower competition keywords instead of the obvious high cost terms, cost per lead dropped by more than half within two months. The channel wasn’t the problem. The strategy was.
A quick reference table
| Strategy | Best for | Typical time to see results |
| SEO and content | Long term organic visibility | 4 to 9 months |
| PPC (Google Ads) | Immediate traffic and testing offers | Days to weeks |
| Social media ads | Brand awareness and retargeting | Weeks |
| LinkedIn ads | B2B lead generation | Weeks to months |
| Email marketing | Retention and repeat business | Ongoing |
Where growth gets harder: saturation and measurement
More businesses investing in digital marketing means more competition for the same searches, the same ad auctions, and the same attention spans. This is the part of the growth story that often gets left out. It’s not enough to simply be present online, because your competitors are too. Standing out now depends on distinct positioning and genuinely useful content, rather than just showing up.
Measurement has also become harder as customer journeys span more touchpoints. Someone might see a video ad, search your brand a week later, then click a retargeting ad before buying. Attributing that sale to a single channel is increasingly unrealistic, which is why marketers who track the right SEO metrics alongside paid data tend to make better budget decisions than those looking at one channel in isolation. If you’re building out a team to handle this, it’s worth understanding what skills a digital marketer actually needs before hiring, since the role has broadened well beyond writing ad copy.
What this means for your business
None of this growth is guaranteed to reach you automatically. The businesses benefiting most from a growing industry are the ones treating digital marketing as a system, content, paid media, and conversion tracking working together, rather than a set of disconnected tasks. If you’re still asking whether you even need a website to run digital campaigns, the short answer is that most industries now do, even if a handful of niche cases can get by on social presence alone.
Keeping content fresh matters too. Search engines increasingly reward pages that stay accurate and current, and staying ahead of SEO trends shaping the year ahead will save you from having to rebuild a strategy from scratch every twelve months. AI generated search results are also changing how people find information, so it’s worth understanding how AI content gets ranked and how tools like SearchGPT are reshaping optimisation before assuming your old playbook will keep working unchanged.
FAQs
Is digital marketing still growing in 2026?
Yes. UK digital ad spend is forecast to reach around £45 billion by 2026, growing roughly 10 percent year on year, with mobile and video advertising leading that growth.
Why is digital marketing growing faster than traditional marketing?
Mainly because audiences have moved online for most of their day, and digital campaigns are easier to measure and adjust in real time than TV, print, or outdoor advertising.
What industries benefit most from digital marketing growth?
Retail and ecommerce see the clearest gains, but professional services, healthcare, and education have all increased spend as more of their audience researches decisions online before making contact.
Is SEO still worth it with AI search tools growing?
Yes, though the approach has shifted. Content still needs to answer real questions clearly and be genuinely useful, since AI summaries pull from pages that already demonstrate expertise and trust.
Getting your share of the growth
A growing market creates opportunity, but it also raises the bar for what counts as a good campaign.
If you want help turning that growth into actual leads and customers, Flow20 works with UK businesses on SEO, PPC, and social advertising built around measurable results rather than vanity metrics. Get in touch today to talk through what’s realistic for your budget and your market.
