Tools · Updated Jun 30, 2026
Ad layout & CLS planner
Every ad you add earns money and risks your Core Web Vitals. Plan the layout here: toggle slots and watch Cumulative Layout Shift, viewability, and revenue potential move together — and see why reserving space is the fix that lets you have both.
Cumulative Layout Shift
0.00
Good
Avg. viewability
64%
3 slots · 3 above fold
Revenue potential
63
Solid balance
With space reserved, your layout keeps CLS at 0.00 (good) while capturing about 63% of the revenue ceiling.
- 3 ads above the fold competes with your content for LCP. Keep the top of the page light and let the first ad load after the main content.
Directional, for planning — not a measurement of your live site. CLS, viewability, and revenue depend on your actual markup, ad sizes, network fill, and how scripts load. The core rule holds everywhere: reserve fixed space for every ad slot so injected ads never shift content. Verify the real numbers with PageSpeed Insights and your CrUX/field data.
The thinking behind the slots
Why these positions, sizes, and the order to add them — the full placement guide with the 2026 viewability data.
What could the layout earn?
Turn viewability into dollars: estimate monthly revenue from your traffic, niche, and network.