One thing I started noticing is that some keywords bring visitors but no one clicks the affiliate links, while others bring fewer visitors but more clicks and sales. It usually depends on what the person is looking for when they search that keyword. If the keyword shows buying interest like best, review, compare, or discount, people are more likely to click a product link. If it is just information, they may only read and leave. Looking at search intent helps. What signs do others use to judge this?