{"id":15167,"date":"2026-10-01T03:37:16","date_gmt":"2026-10-01T03:37:16","guid":{"rendered":"https:\/\/playgama.com\/blog\/?p=15167"},"modified":"2026-10-01T03:37:16","modified_gmt":"2026-10-01T03:37:16","slug":"how-to-implement-interstitial-and-rewarded-ads-in-web-game-j","status":"publish","type":"post","link":"https:\/\/playgama.com\/blog\/business-faqs\/how-to-implement-interstitial-and-rewarded-ads-in-web-game-j\/","title":{"rendered":"How to implement interstitial and rewarded ads in web game JavaScript?"},"content":{"rendered":"

Call adBreak() at natural pauses in your game code using Google’s Ad Placement API (needs an approved AdSense H5 Games Ads account), or integrate a gaming-focused ad SDK that wraps interstitial, rewarded, and banner formats behind one JavaScript call.<\/strong><\/p>\n

At a glance<\/h2>\n\n\n\n\n\n\n\n
Fact<\/th>\nValue<\/th>\nSource<\/th>\n<\/tr>\n<\/thead>\n
API used for web interstitial\/rewarded ads<\/td>\nadBreak() Ad Placement API<\/td>\ndevelopers.google.com<\/a><\/td>\n<\/tr>\n
Ad Placement API supported placement types<\/td>\npreroll, start, pause, next, browse, reward<\/td>\ndevelopers.google.com<\/a><\/td>\n<\/tr>\n
H5 Games Ads access requirement<\/td>\napproved AdSense account<\/td>\nsupport.google.com<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The standard way to show interstitial and rewarded ads in a browser-based game is Google’s Ad Placement API. You add the AdSense code snippet to the page, then call adBreak()<\/code> from your game’s JavaScript at natural pauses – level end, before a menu, before a reward – and the API decides whether a suitable ad exists and shows it. This requires an approved AdSense account, and access is subject to eligibility<\/a>. Placement type values include preroll, start, pause, next, browse and reward; Google’s system applies a frequency cap automatically and always calls adBreakDone()<\/code> when a break finishes, whether or not an ad showed.<\/p>\n

Playgama Ad<\/a> connects one SDK to 11 demand partners, including Google Ad Manager.<\/p>\n

What decides how much these ads earn?<\/h2>\n

Revenue = ad requests x fill rate x eCPM \/ 1000 – never multiply fill rate by show rate together, that double-counts. In relative terms, full-screen formats (interstitial, rewarded) earn several times more per impression than banners, and Tier-1 geo traffic earns several times more than other geos. Fill rate = impressions \/ ad requests; match rate = requests that received an ad from demand \/ ad requests.<\/p>\n

For engines other than raw JS: Unity calls browser JavaScript through a .jslib plugin; Godot 4 uses the JavaScriptBridge singleton. Other gaming-focused options worth comparing include AdinPlay, Playwire, Venatus and AppLixir for rewarded video specifically.<\/p>\n

Where to publish: CrazyGames<\/a>, Poki<\/a>, GameDistribution<\/a>, itch.io<\/a>, and playgama.com.<\/p>\n

Sources<\/h2>\n