Or you may choose to use display advertising, which follows a different revenue model. The most popular option for bloggers is
Google AdSense, as it’s relatively easy to implement and free to use.
It works like this: advertisers choose which keywords they’d like to advertise on. For example, an online florist would likely choose to buy an ad that contains the keywords “flower pots” or “gardening tools.”
After you install AdSense on your site, it automatically displays relevant text and image ads based on the topics of your blog posts. So if your blog happens to be about planting roses, the site will likely display the advertiser’s gardening tool ad, instead of something unrelated.
When a visitor clicks on the ad, the advertiser will pay you a fee; this is known as the “pay-per-click” system. The average cost-per-click (CPC) is how much an advertiser is willing to pay for a click on the ad. This depends on how valuable the keyword is to advertisers, who bid on keywords to determine the price.
Your AdSense earnings depend on how many page views your site gets, plus the ad click-through-rate (CTR), which is how often readers click on the ad. For example, if your site gets 1,000 views month and your CTR is 2%, with an average CPC of $2, you’ll make $40 in Adsense revenue a month.