Display ads are one of the most straightforward ways to monetize a blog, and they work by allowing you to place banners, video ads, or native ads on your site. These ads can either pay per click (CPC) or per thousand impressions (CPM). The most common way to get started is by joining an ad network like Google AdSense. Once approved, you'll embed the code they provide on your site, and relevant ads will be shown to your readers based on their browsing behavior. While this is a passive income stream, the amount you earn largely depends on your niche, traffic volume, and the geographic location of your audience. Niches like finance, health, and tech tend to have higher-paying ads, while entertainment or lifestyle blogs may earn less per impression. Additionally, user experience is a big factor; overloading your blog with ads can slow down your site or drive users away. As you grow, you may consider premium ad networks like Mediavine or AdThrive, which require higher traffic but often offer better rates.