Lesson 10 of 1713 minIntermediate
Performance and Core Web Vitals
CLS: reserve space for everything
Explicit image dimensions, reserved ad and banner slots, and font-display strategies eliminate most layout shift.
Why this lesson matters
This lesson belongs to Performance and Core Web Vitals, the part of Technical SEO Excellence where the goal is: fix the template, not the page.
Read it once, then do it straight away on a real site inside RankAudit. Nothing here is theory for its own sake — every step produces something you can show a client.
Do it now
- 1Open RankAudit with sample data already loaded, so you are not stuck on setup.
- 2Crawl a site and triage the issue list.
- 3Take one template's worst vital in RankAudit, ship one fix, and re-measure after deployment.