Under an assumption that you have multiple websites, some of them are high-paid keywords oriented and some of them are normal websites. Will you use only one adsense account for these websites, I'm apt to think think that they may affect each other a lot. Any directions please>
you can use same account on multiple sites. Ads are displayed as per content of the sites, so issue there.
google allows you to use on multiple websites..but one adsense account on each websites will not be permited by google..
you are allowed to use your adsense account in many site you want in maximum 200 ads channel Google AdSense Help Desk