2025 in Review: The Year AI Stopped Being a Buzzword in Advertising

2025 was the year AI moved from pitch deck slides to actual production systems in advertising. Not the vague AI everyone has been talking about for years at conferences. Real, measurable intelligence baked into how campaigns are bought, optimised, and measured. We saw this transformation happen in real time on our own platform, and we have the data to back it up.

Here is what stood out to us at Adxe this year, and what we think it means for where the industry is heading.

CTV Went Mainstream

Connected TV was the breakout channel of 2025. Ad-supported streaming tiers matured across every major platform. Inventory quality improved dramatically as publishers invested in their programmatic infrastructure. And measurement solutions finally started catching up, giving performance advertisers the confidence to shift real budget into the living room.

On our platform, CTV spend grew over 200% year-over-year. Brands that were cautiously testing CTV with $5,000 experimental budgets in Q1 were running always-on campaigns at $50,000 per month by Q4. Completion rates consistently topped 90%, and the cross-channel lift data made the ROI case impossible to ignore. When your display retargeting CTR doubles for users who saw a CTV ad first, the budget conversation changes fast.

In-App Found Its Identity

In-app advertising shed its reputation as a channel only for gaming companies. We saw e-commerce brands, fintech companies, subscription services, and even B2B brands shift meaningful budget into in-app environments this year. The reason was attention. Users inside apps are engaged in a way that mobile web users simply are not.

Our performance data consistently showed in-app delivering higher completion rates, better viewability scores, and stronger post-click behaviour than equivalent mobile web campaigns. CTRs ran 3-4x higher. And because in-app uses device identifiers rather than cookies, it was completely unaffected by the ongoing privacy changes that were eroding display targeting capabilities.

The brands that figured this out early in 2025 had a real advantage. The ones that still think of in-app as rewarded video ads inside Candy Crush are leaving money on the table.

Display Got Smarter, Not Smaller

Display did not die in 2025. We know, shocking. But it did evolve in an important way. The brands succeeding with display on our platform stopped using it as a prospecting channel and started using it as the connective tissue in cross-channel campaigns.

Display for retargeting after CTV exposure. Display for sequential messaging after native engagement. Display as reinforcement, not introduction. This strategic repositioning of display from a standalone channel to a supporting player in a larger campaign architecture was one of the most important tactical shifts we observed this year.

The data supports it. Display retargeting campaigns that ran alongside CTV and native prospecting delivered 40-50% lower CPAs than display-only campaigns targeting the same audiences. The channel works. It just works best when it is not trying to do everything on its own.

Predictive Bidding Became Table Stakes

This was the year where fixed CPM bidding started feeling like dial-up internet. Advertisers increasingly demanded platforms that could evaluate each impression individually and bid accordingly, rather than applying the same flat rate across an entire targeting segment.

At Adxe, our predictive models processed billions of bid opportunities this year. The performance gap between AI-optimised campaigns and manually managed ones widened every quarter. By Q4, campaigns running for three or more months were outperforming their first-month benchmarks by 30-40% on CPA, purely from model learning. Platforms without this capability were simply unable to compete on efficiency.

Looking Ahead to 2026

We think 2026 will be defined by convergence. The lines between CTV, display, native, and in-app will blur further as advertisers demand unified cross-channel strategies managed from a single platform. The days of running each channel through a separate vendor with separate reporting are ending, and the data is clear about why: unified campaigns outperform siloed ones by a wide margin.

Measurement will improve but remain imperfect. That is the honest truth. Anyone promising perfect attribution is selling something. The platforms that win will be the ones giving advertisers the best imperfect picture, enough signal to make smart decisions without pretending the data is more precise than it actually is.

And the platforms that win will be the ones that make complexity disappear for the advertiser. That is what we are building toward. See you next year.