As many webmasters suggest that you should change the color of the search box to match the background of your site and text so that your AdSense search box should look like it belongs to the page, well..in fact a colorful and recognizable search box will stand out on your site and it works too, many bloggers have different result with both of them.
You also have the option given by AdSense whether you’d like the search results to be opened within your own website or to be host by Google. Many publisher choose to open within their own sites so that readers will believe that the source of search resullt is from your blog and this makes them love to click ads. The other reason is that the site owner have more control over the design. It’s not a bad idea also to put your search box on the results page itself for any users who might want to make another searches.
Publishers also can insert keywords to refine the results to make them more relevant to your readers. Let’s say you have a website about Photoshop, you can enter the keywords “Adobe”, “Computer Softwares” and “Photos”.
Your AdSense search box should be placed where your visitors can find it with a quick glance. Locations such as below the header and right or left navigation column are good spots for this. Place it above the fold, it means that the visitors should not have to scroll down in order to notice the search box. You can also place it below each post for easy navigation.
Another important thing should be considered is adding your logo, this is a cool feature because it provides chance for your readers to see and remember your logo that might increase their chances of remembering your website for a future visit.