Skip to content
~/reflective_data

analytics-dictionary / term / tracking & measurement

Tracking pixel

A tracking pixel is a tiny, usually invisible image or script that records an interaction, such as an email open or an ad conversion.

Written by Reflective Data experts · updated Oct 5, 2026

When the browser loads the pixel it sends a request to the vendor, which logs the visit. Ad platforms use pixels to measure conversions and to build audiences.

Because pixels run in the browser, they are affected by ad blockers and consent choices, which is a reason many teams add server-side delivery.

related

Consent ModeCookieServer-side tagging

// how we can help

Need tracking you can trust? We implement and audit analytics across GA4, Adobe, Mixpanel and more. Analytics & tracking services → · Audits

more in tracking & measurement

third-party-cookies.md

Third-party cookies

Third-party cookies are set by a domain other than the one you are visiting, mainly for…
customer-lifetime-value.md

Customer lifetime value (LTV)

Customer lifetime value is the total revenue or profit you expect from a customer over the…
enhanced-conversions.md

Enhanced conversions

Enhanced conversions send hashed first-party data, like an email address, with a conversion so Google can…
impression.md

Impression

An impression is each time an ad, a listing or a piece of content is displayed…
marketing-mix-modeling.md

Marketing mix modeling (MMM)

Marketing mix modeling uses statistics on aggregated data to estimate how each channel contributes to sales.
bounce-rate.md

Bounce rate

Bounce rate is the percentage of sessions in which the visitor did not engage with your…

← full analytics dictionary