When traffic is no longer a measure of success: metrics in the age of generative AI
Gianna Calchini
Website traffic has been an important metric in the search environment for years. Since ChatGPT, Gemini and Perplexity started providing answers directly, this traffic has been steadily declining for many companies without any drop in demand. We show you which metrics really matter now and how you can re-measure the success of your digital presence.
In brief
Traffic drop without a decline in demand: AI assistants answer search queries directly. Users click on websites less often, even though they continue to search for information.
New metrics instead of old KPIs: Measure your brand presence with key performance indicators (KPIs) such as brand mentions, number of citations, prompt gap and entity coverage. Our KPI overview provides guidance and shows you how to measure success across all relevant channels and interactions.
Act now: Many companies still measure by old standards and do not realise that their digital strategy is losing its effectiveness.
What has changed
The online marketing landscape is currently undergoing one of the biggest changes since Google was founded almost three decades ago. AI-driven search technologies such as Google's AI Overviews and AI Mode, as well as third-party systems such as ChatGPT, Perplexity and Claude, have rapidly gained popularity and fundamentally changed users' search behaviour.
According to Sistrix, ChatGPT has achieved a market share of 9% after only a few years and records between 0.57 and 1.31 billion relevant search queries every day.
These changes are reducing traffic on many websites without diminishing users' need for information. Parent portals, baby websites and health portals with informative content are particularly affected, as a recent study by Sistrix shows. This content is increasingly being integrated into zero-click searches. The simpler and more well-founded the information is, the more likely it is to be returned by AI-driven search technologies, e.g. a postcode or the maximum amount for a pillar 3a pension plan.
We are also observing this trend at Unic. In the fourth quarter of 2025, we saw a decline in traffic among various customers, in some cases by up to 32% compared to the same period last year.
These developments raise the question of what role a company's own digital presence will play in the future. Marketing managers need to rethink their strategies for digital visibility, starting with metrics and KPIs and the question of what success actually means in the digital world.
Why the old KPIs no longer work
Until now, website traffic has been considered one of the most frequently cited KPIs in digital marketing, even though in many cases it has never been a business-relevant metric. However, the increasing importance of AI-driven search engines is changing the rules of the game. Today, other metrics such as brand visibility, brand mentions and citations in AI-driven search engines are increasingly coming to the fore. Users receive answers directly from third-party systems without even visiting websites. Brands that are not present here risk losing potential customers at the very beginning of their journey.
Traffic-focused performance measurement is therefore problematic because it can lead to false conclusions. A decline in traffic can be misinterpreted as a loss of interest or demand, even though the actual goal of customer loyalty and conversion remains unchanged.
That's why brands today need to develop a more complete picture of their digital presence and success.
Which metrics matter now: The Unic perspective
To meet the new requirements in digital marketing, we at Unic have compiled a KPI overview. The overview divides metrics into four levels, which together provide a comprehensive picture of digital presence:
Business Value
Engagement Rate
Brand Presence
Technical Foundation
Each of these categories includes specific KPIs that enable companies to precisely tailor their digital strategy. The KPIs at the business value, engagement and technical foundation levels are primarily measured on the company's own platform.
The KPIs for brand presence require a cross-channel analysis that includes all relevant AI-supported search systems. In addition, metrics from social networks, podcasts and other external touchpoints can be added.
As described in the article ‘Search Everywhere Optimisation’, digital visibility is increasingly shifting from individual search engines to a networked ecosystem of search and response systems. In this context, Search Everywhere Optimisation encompasses not only expanding presence across different channels, but also measuring cross-channel visibility.
Key digital marketing KPIs for 2026 explained
In our view, the following metrics are becoming increasingly important:
Business Value
Conversion rate from AI traffic: What is the conversion rate for users who arrive at the website via AI-driven traffic?
Engagement
Referral traffic: How many users land on our website via LLM referrers? Which URLs receive particularly high traffic?
Engagement rate: How high is the engagement from AI-generated traffic?
Brand Presence
Brand Mentions: How often is our brand mentioned in LLM responses?
Citations: How often is our website or content cited as a source in LLM responses?
Entity Coverage: Which entities or topics is our brand associated with?
Prompt Gap: For which prompt queries do our competitors appear, but our brand does not? What are our competitors doing differently from us?
Technical Foundation
Requests from LLM-Bots (user-triggered): How often do user-initiated LLM bots access the content on our website? What specific content is requested?
The overview presented above is not exhaustive and varies depending on business objectives, industry and other aspects. We note that existing KPIs are still relevant, but need to be supplemented by new metrics from AI-generated search in order to obtain a complete overview of user behaviour and the success of digital measures.
How companies are tackling change
AI-powered search engines are not just a trend, but the future of digital marketing. Marketing experts must now lay the necessary foundations to enable data-driven decision-making in the new era.
An important first step is open dialogue with all relevant stakeholders. Only through transparent communication and clear expectations can all parties involved understand and support the necessary changes. This process creates a common foundation on which the entire strategy can be built.
A thorough review and adaptation to new KPIs are important next steps in successfully mastering the change.
At Unic, we offer a KPI workshop in which we work with you to analyse your business and online goals and translate them into measurable KPIs. This ensures a clear focus and enables you to measure concrete successes.
What we observe with our customers
One of our customers in the travel and tourism industry experienced a halving of their click-through rate over several months following the launch of Google AI Overviews, while at the same time doubling their impressions in organic search according to Google Search Console.
Conversions on the website also increased during this period, which, given the consistently high customer demand, suggests an increase in zero-click searches. The customer therefore continues to focus strongly on conversion figures, and it is therefore important to enable the team to measure conversion paths on the website in a way that is both clean and compliant with data protection regulations.
Conclusion: Measure what really matters
Measure what really matters and adapt your digital strategies to the new circumstances. Question old KPIs and focus on brand presence in AI-driven search engines. Those who fail to act now risk losing digital visibility and missing the boat.
Are you still measuring traffic or already measuring impact?
In our KPI workshop, we work with you to analyse which metrics are truly relevant for your company and how you can align your digital strategy with them.
Contact for your Digital Solution with Unic
Book an appointmentAre you keen too discuss your digital tasks with us? We would be happy to exchange ideas with you.
Contact for your Digital Solution
Book an appointmentAre you keen to talk about your next project? We will be happy exchange ideas with you.
