The AdSense ad will try to find keywords from your web page and put relevant Ad on your page, but many times, when I look at web pages in the internet, I always find totally unrelated AdSense ads, and of course, I didn't click on it cos it's unrelated. The question is : How can we control those Ad? I think it's an important issue to increase the CTR and result in more money, please share your experience, thank you.
You can manipulate the ads that show by inserting keywords in the title of the page and content, I wouldn't advise you to do it though. I saw computer websites that were placing mortgages titles just to get mortgage ads on their sites because paid more. It's not ethical, it's risky, not worth it IMHO. Stay clean, stay safe, be happy.
It helps to use Section Targeting in your source code. <!-- google_ad_section_start --> ads relative to this content <!-- google_ad_section_end -->