The render rate measures the success rate of ad display, indicating the percentage of ads that are correctly shown to users after the ad selection process.

A low render rate indicates problems that can be attributed to various factors:

Ad blockers
Technical issues: loading errors or page slowness.
Format incompatibility: preventing correct display.
Errors in lazy load configuration
Internet connection issues for ads: causing incomplete ad display

And what about the economic impact?

A low render rate results in technological costs (serving the ads) and a reduction in revenue (drop-in fill rate and bid density – the number of advertisers).

Considering the above, it is important to track this metric and analyse the underlying causes to improve the effectiveness of online advertising and optimize the ad experience for users.