HTML5 games run in modern web browsers. Developers use the canvas element WebGL audio APIs and input events to build gameplay. Because they are web based players do not need to download large files. Publishers can embed games in websites share them on social channels or wrap them as native apps.
HTML5 games are ideal for reaching wide audiences with minimal friction. They are quick to launch easy to update and friendly to players and publishers alike. If you want I can make a game page template landing page or SEO ready blog post for a specific HTML5 game idea right now.