Often, companies will pay you to link to them on your blog because they want the increased exposure as well as the “link juice” that they get from an inbound link to their website. Be careful with this one because in some instances it can violate Google’s TOS, which, in the most extreme circumstances, can result in your website being removed from the search engines.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.