Why your Meta and TikTok campaigns no longer perform like they used to( and what changes in 2026)

Conclusions of the Conclusions from the webinar we delivered on May 7, 2026, at the Madrid Chamber of Commerce, together with Tealium, as part of the TIC Negocios programme.

The problem we are seeing in 2026

“It used to work for me, but now it doesn’t.” This is the phrase we hear most often in the conversations we have in Impulsa3 with brands that scaled for years on Meta Ads or TikTok Ads and suddenly see their ROAS plummet without having changed anything on their end.

The pattern is repeated across 8 out of 10 companies that come to Impulsa3’s paid media team saying that their advertising investment has stopped performing. And it is almost never the platform’s fault. What has changed is the entire systemWhat has changed is the entire system: algorithms, audiences, measurement, the role of creativity, and the way acquisition is connected to the business’s real profitability.

On May 7, 2026, we explained this full diagnosis in a webinar hosted by the Madrid Chamber of Commerce, in collaboration with Tealium. Five phases that need to work together for paid media to be profitable in 2026. If one fails, the entire system is affected. This article distils the main conclusions.

Full webinar video (60 minutes): https://www.youtube.com

The five phases of profitable paid media in 2026

Phase 1 · What determines whether your investment wins or loses is your numbers, not your campaign

The most honest metric for the health of an acquisition system is the ratio LTV / CAC (customer lifetime value divided by the actual acquisition cost). Above 3, the business is healthy. Around 1, you sell but do not make a profit. Below 1, each new customer makes you poorer.

Three common mistakes at this stage:

• Confusing the CPA that Meta reports with the actual CACConfusing the CPA reported by Meta with the actual CAC. CPA only accounts for spend on a single platform. Actual CAC includes agencies, tools, team costs, and the percentage of salary allocated to acquisition. In the accounts we audit, the actual CAC is usually twice the reported CPA.
• Calculating gross margin and operating as if it were the actual margin. When shipping, returns, packaging, and payment gateway and marketplace fees are deducted, a declared margin of 60% often becomes an actual margin of 25–30%.
• Confusing strategic metrics with process metrics. CTR, CPM, reach, and frequency help diagnose a campaign. CAC, LTV/CAC, break-even ROAS, and payback determine the business. Managing the latter with the former’s metrics is one of the most expensive paid media mistakes in 2026.

Phase 2 · The balance between targeting and creativity has shifted

In 2022, around 70% of a paid media team’s work was segmenting audiences. In 2026, that 70% has shifted to producing creative assets and letting the algorithm handle segmentation. The reason is structural: Meta Andromeda and TikTok SymphonyMeta Andromeda and today’s optimisation engines on each platform process orders of magnitude more signals than their predecessors and are better at finding the right customer within open audiences than within narrow lookalikes.

Practical implications for 2026:

• A winning creative rarely lasts more than 7 to 10 days A winning creative rarely lasts more than 7 to 10 days before its performance starts to decline. The refresh rate needs to be weekly, not monthly.
• A healthy campaign keeps active 4 to 6 creative angles simultaneously: problem-solution, identity, comparison, social proof, urgency/scarcity, and authority. A single angle limits the algorithm to just one potential customer profile.
• Brands that go from 5 to 40 active creatives per month double their ROAS without changing the budget., according to what we observe in DTC accounts that have made this transition.

The creative brief comes from two places most teams do not look at: the public ad libraries (Meta Ad Library, TikTok Creative Center, Google Ads Transparency) and the real customer reviews from Amazon, Google, Trustpilot, or Shopify. The words that perform in advertising are the ones your customers are already using.

Phase 3 · The end of the lookalike and the default Advantage+ trap

The quality of lookalikes has deteriorated due to privacy changes, and today’s AI is better at finding your customer within broad audiences by using creative as a targeting filter than within a low-precision lookalike audience. The modern paid media account operates with open audiences and well-thought-out exclusions.

About Meta Advantage+ and TikTok Smart+ being enabled by default:

• They work well They work well for physical product ecommerce businesses with enough conversion history.
• They perform inconsistently for digital products or SaaS, where the final conversion requires control over each stage of the funnel.
• They perform poorly for B2B services, where the actual conversion happens weeks later outside the platform. Leaving Advantage+ enabled by default in B2B fills the CRM with leads that do not buy.

The well-executed exclusions - excluding recent buyers, leads in another active flow, and segments with no margin - are one of the fastest ways to lower CAC without changing the budget. Most audited accounts have default exclusions, which is equivalent to paying to relearn customers who were already in the database.

Phase 4 · Measurement is the phase that amplifies all the others (or sinks them)

After the iOS privacy changes and the progressive loss of third-party cookies, the browser pixel loses between 20% and 40% of events depending on the type of traffic. This means that the platforms’ AI is learning from incomplete information: it optimises towards where it “sees” conversions, not where they actually happen.

The minimum viable measurement stack in 2026 includes:

• Meta Conversions API (CAPI) sending server-side events, deduplicated with the browser pixel, with a matching quality score above 7.
• TikTok Events API fulfilling the same function on that platform.
• Event enrichment with hashed customer data.email hash, phone hash, IP, user agent. Without enrichment, event quality can drop from 8 to 4 without anything apparently changing.
• Distinction between new and recurring conversions.If all sales are reported as “Purchase” without differentiation, the algorithm will optimize to find customers you already had, which inflates CPAs and wastes budget.

For brands operating across multiple channels or already noticing discrepancies between what Meta reports and what Google says, a Customer Data Platform.Tealium, Segment, mParticle, becomes the source of truth. It is the piece we discussed in the webinar with Óscar López, Senior Solutions Consultant at Tealium: when platforms lose visibility due to privacy, the first-party information you own becomes your most defensible asset.

Phase 5 · Every improvement in LTV mathematically reopens viable CAC.

Acquisition is only half the job. What happens after the first sale determines whether that ad investment was truly profitable. A brand that improves its LTV by 30% can invest 30% more in acquiring the same customer. without losing profitability.

The four elements that live outside the Meta and TikTok dashboard but determine profitability:

1. Differentiated remarketing. that separates visitors, cart abandoners, recent buyers, and repeat customers. Showing acquisition ads to someone who has already purchased is pure waste.
2. Source survey at checkout. (“How did you hear about us?”). It costs nothing, is worth its weight in gold, and is the only clean attribution you will have. Cross-checking it monthly against what Meta and TikTok report usually reveals between 20% and 40% over-attribution on the platforms.
3. CRM activation toward advertising platforms.Periodically upload the customer database, with GDPR consent, as a custom audience and exclude it from acquisition campaigns. Higher-quality lookalike audiences, acquisition budget that does not reacquire existing customers.
4. LTV measurement by cohort.An aggregate LTV can hide the fact that recent cohorts are worse than older ones. Comparing January against June against October is the only honest way to detect silent deterioration in time.

What you should take away from this article if you only have 90 seconds.

• In 2026, if your paid media is no longer performing like it used to, it is almost never Meta’s or TikTok’s fault. It is because the system has changed.
• The five phases have to work together. If one fails, the others perform below their potential.
• The metric that determines whether you win or lose is not ROAS, it is the ratio. LTV / CAC.
• Creativity matters more than targeting. The 70/30 split has been reversed.
• Server-side measurement is now an entry requirement, not a nice-to-have.
• Acquisition is only half the job. The other half happens after the first sale.

Watch the full webinar.

📺 How to launch and scale profitable campaigns on Meta and TikTok in 2026. . Madrid Chamber of Commerce · May 7, 2026 · 60 minutes YouTube video

Speakers:

• Jorge Nevado, CEO of Impulsa3.
• Aurora BermúdezHead of Traffic Acquisition at Impulsa3.
• Natalia ValenciaDigital Advertising Specialist at Impulsa3.
• Óscar LópezSenior Solutions Consultant at Tealium.