What is TTFB by acquisition channel
TTFB by acquisition channel shows the Time to First Byte (TTFB) across different acquisition channels (e.g. Direct, Organic, Referral, Custom UTM). This lens helps you uncover which traffic sources experience slow server responses — a common bottleneck in web performance.
Only acquisition channels that generated traffic during the selected time period will be shown.
TTFB measures how fast the server starts responding after a user navigates to a page. It’s the first impression your backend makes — and a high TTFB often means users are stuck waiting before the browser can even start rendering.
Healthy TTFB by acquisition channel sample
Should you worry
A healthy TTFB by acquisition channel lens is all green. Some acquisition sources may be slightly faster or slower, but as long as there’s no yellow or red, server response times are within a healthy range.
Unhealthy TTFB by acquisition channel sample
In this example, Direct traffic not only dominates, but also suffers from a slow TTFB. This might be due to personalized content, server geolocation issues, or heavier backend logic kicking in when users aren’t served cached pages.
Slow TTFB often delays the full loading process, impacting metrics like LCP and INP as well.
Resolving unhealthy TTFB by acquisition channel
Go-to action plan to resolve an unhealthy TTFB by acquisition channel:
Ask Uxi to analyze your TTFB by acquisition channel values and suggest improvements.
Use Filters to drill into the slow medium and determine which pages are commonly accessed.
Simulate TTFB of the suspected lens to see if fixing it will resolve the TTFB by acquisition channel. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your TTFB by acquisition channel values.
Once you’ve improved TTFB, set an alert to be the first to know if it starts worsening again.
Try it yourself
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