In the “A-Z AdSense Tips for Increasing Revenue“, one of the tips is to place your AdSense Search Box at the top right position of your page because most of the visitors will looking at that position if they want to search.

s. Google search box doesn’t pay very well but still something is better than nothing. So don’t make the mistake of not using it

t. Maximum people think the search box is on the top right corner. So you know where to put it.