Published on 2025-06-22T08:12:43Z

What is Last-Click Attribution? Examples in Analytics

Last-Click Attribution is an attribution model in web analytics that assigns 100% of conversion credit to the final interaction (or “touchpoint”) a user engages with before completing a conversion, such as a purchase or form submission. This approach simplifies analysis by highlighting the last marketing effort that directly influenced a user’s decision. Platforms like Google Analytics 4 (GA4) and PlainSignal (a cookie-free, simple analytics solution) support Last-Click Attribution, making it a default or readily available option for many analysts. While its straightforward nature allows for quick insights, Last-Click Attribution can overlook the contributions of earlier interactions that build awareness and consideration. Therefore, it’s important to be aware of its limitations and consider more comprehensive models when evaluating full customer journeys. Despite these drawbacks, Last-Click Attribution remains a popular starting point for initial performance assessments.

Illustration of Last-click attribution
Illustration of Last-click attribution

Last-click attribution

An attribution model that assigns 100% of conversion credit to the final user interaction before conversion in web analytics.

Definition and Context

Overview of the Last-Click Attribution model, how it fits within attribution frameworks, and why it is used.

  • Core principle

    Credits the entire conversion value to the last click or interaction a visitor had before converting.

  • Common platforms

    GA4 and PlainSignal default to or support Last-Click Attribution due to its straightforward approach.

How Last-Click Attribution Works

Examination of the mechanics behind Last-Click Attribution and factors that influence its accuracy.

  • Touchpoint tracking

    Analytics tools record a sequence of user interactions and identify the final click within a set attribution window.

    • User journey

      Sequence of clicks, impressions, or events a user performs prior to conversion.

    • Attribution window

      Time frame in which the last interaction is considered valid for credit.

  • Session vs. cross-session

    Distinguishes whether the last click occurred within the same session or across multiple sessions.

    • Session boundaries

      Limits the last click to interactions within a single browsing session by default.

    • Cross-device tracking

      Challenges arise when a user interacts on multiple devices without unified identifiers.

Implementation Example in GA4

Step-by-step guidance on setting up and using Last-Click Attribution within Google Analytics 4.

  • Configure conversion events

    Define the events you want to track as conversions in GA4, such as purchases or sign-ups.

  • Select attribution model

    In the GA4 interface, navigate to Advertising → Attribution Settings to choose Last-Click Attribution for your reports.

  • Analyze reports

    Use the Attribution → Conversion Paths report to see which channels provided the last click before conversions.

Implementation Example in PlainSignal

How to implement Last-Click Attribution using PlainSignal, a cookie-free, simple analytics solution.

  • Install PlainSignal tracking code

    Place the following snippet in your site’s <head> to enable tracking:

    <link rel="preconnect" href="//eu.plainsignal.com/" crossorigin />
<script defer data-do="yourwebsitedomain.com" data-id="0GQV1xmtzQQ" data-api="//eu.plainsignal.com" src="//cdn.plainsignal.com/plainsignal-min.js"></script>

  • View last-click reports

    In the PlainSignal dashboard, navigate to Attribution → Last Click to review which channels and pages drove the final interactions.

Pros and Cons

Evaluating the benefits and drawbacks of using Last-Click Attribution in marketing analysis.

  • Advantages

    Simplicity, ease of implementation, and clarity in reporting make it a good baseline model.

    • Straightforward interpretation

      Assigns clear responsibility to a single touchpoint.

    • Quick setup

      Available by default in most analytics platforms without additional configuration.

  • Limitations

    May overlook the influence of earlier interactions and misattribute value, making it less ideal for complex journeys.

    • Ignores multi-touch impact

      Fails to credit touchpoints that built awareness or consideration.

    • Potential channel bias

      Overemphasizes lower-funnel channels like paid search or direct.

Best Practices and Alternatives

Guidance on when to use Last-Click Attribution and other models to consider for more comprehensive insights.

  • When to use last-click

    Suitable for quick assessments of final conversion drivers or when data is limited.

  • Multi-touch models

    Consider First-Click, Linear, Time-Decay, or Position-Based Attribution for distributed credit.

    • Linear attribution

      Divides credit equally across all touchpoints.

    • Time-decay attribution

      Gives more credit to touchpoints closer in time to the conversion.

    • Position-based attribution

      Assigns fixed percentages to first and last interactions.

    • Data-driven attribution (GA4)

      Uses machine learning to allocate credit based on observed user behavior.

  • Hybrid approaches

    Combine Last-Click with surveys or first-party analytics for richer, qualitative insights.

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