Adsense is a program that can be followed by anyone who wants to earn additional money from the internet by installing Google Adsense ads on your website or blog.
The contents of Adsense Ads that will appear in your blog will adjust to the content of your blog content. For example, if your site content is about car or automotive, then most likely Adsense ads that appear are automotive advertisements. The Google system will scan the content of your blog and post relevant / appropriate ads. (Google is very sophisticated!).