Google AdSense is the most widely adopted advertising network for small-medium websites. This service is highly flexible, supporting a huge variety of ad creative sizes, including both in-page advertising formats (including banners and skyscrapes, as well as multiplex/grid ads and related search units), plus some innovative overlay formats that don't disrupt the site's content structure (including anchor ads, side rails, and vignette ads). As the name indicates, the service is operated by Google, so it command huge reach and is backed by a reliable company. Given that many ads come from the "Google Ads" search and display advertising platform, there is no shortage of advertisers on the network, providing competitive rates as a result. Payments are issued monthly and performance stats are updated almost in real-time, providing great earnings visibility throughout the day. Highly recommended.

Ezoic isn't quite an alternative to Google AdSense, in that it functions most effectively for publishers who are members of both Ezoic and AdSense, through their fascinating "mediation" process that helps to bundle AdSense ads into a larger network of advertising. Ezoic supports both large and medium sites, with different features and benefits available to sites that graduate into their high traffic "Premium" program. The network offers more than just ads. They also assist with caching and other performance improvements, AI-driven content refinement, video generation and much more. This is a suite of performance offerings that is definitely worth exploring. Highly recommended.