What is Google AdSense
Google AdSense is a free, simple way for website publishers of all sizes to earn money by displaying targeted Google ads on their websites. AdSense also lets you provide Google search to your site users, while earning money by displaying Google ads on the search results pages.
Google AdSense delivers easy to read and text and image-based ads targeted to the content of your pages and AdSense for search queries.
If your visitors come back day after day, they'll likely become blinded to the position of the ads over time, regardless of the ad colors. Try customizing the way your ad looks or occasionally switching the location of your ads on the page.
If your site is filled with ads or packed with loads of competing content, chances are that you'll need to use more visually arresting colors to make your ads catch a user's eye. If the techniques above aren't getting results for you, try using more prominent ad styles.
Google has approved Responsive AdSense Ads and thus AdSense publishers can display different ad units based on the device or screen size of the visitor.