is there any way that you can take off the "ads by goooogle" and "advertisie on this site" from the adverts? If so how ? . I've seen sites before that display adsense and they do not have these two captions under their ads? how do they do this?

If you want to remove the Advertise on this site text link, follow these steps:
1 Log in to your AdSense account.
2 Under the My Account tab, visit the Account Settings page.
3 Scroll down to the Onsite Advertiser Sign-up section (right at the bottom) and click ‘edit.’
4 Untick the Include me in Onsite Advertiser Sign-Up check box next to Subscription:
5 Click Save changes.