Google AdSense is an advertising program that allows website owners and bloggers to monetize their online content by displaying ads on their website. The program works by matching relevant ads with the content on the website. Advertisers bid on ad space, and Google uses an algorithm to determine which ads to display on the website.

Here's how Google AdSense works:

1. Website owners sign up: Website owners sign up for the AdSense program and create ad units to place on their website. Ad units can be text ads, display ads, link units, or matched content.
2. Advertisers bid for ad space: Advertisers bid for ad space on the website through Google AdWords. They set a maximum bid amount and bid on specific keywords related to their product or service.
3. Google selects ads: Google uses an algorithm to select the most relevant ads to display on the website. The algorithm takes into account the content of the website, the keywords used in the ad, and the bid amount of the advertiser.
4. Ads are displayed on the website: The selected ads are displayed on the website, and visitors to the website can click on them. Website owners earn money for each click on an ad, and the advertiser pays Google for the click.
5. Website owners earn money: Website owners earn money for each click on an ad. The amount earned per click varies depending on the type of ad and the advertisers bidding for the ad space on the website.
6. Google pays website owners: Google pays website owners for the clicks on the ads displayed on their website. The payment is usually made on a monthly basis, and website owners can view their earnings and performance data in their AdSense account.

In order to maximize earnings from AdSense, website owners should focus on creating high-quality content that is relevant to their target audience. They should also optimize their website for search engines to increase traffic to their website, which can increase the number of clicks on their ads. Website owners should also consider testing different ad formats and placements to see which performs best on their website.