For those who want to monetize their websites, one the main issues is how to use ads without annoying visitors. When you have a lot of ads, your visitors might leave your site or even use ad blocker. People do not like intrusive ads or too many ads, it will make your site messy. Cluttered websites are turn off for many. Therefore, a lot of care should be taken regarding ads usage. What is the correct number of ads in a website?