How to link YouTube with AdSense

Difference Between Google AdWords and AdSense

The Google AdWords program enables you to create advertisements which will appear on relevant Google search results pages and partner sites.
Google Adwords is a program you can use to get listed in the search results for Google and other search engines, such as AOL, for which it supplies advertisements. You essentially create an account, insert your advertisement, pick the maximum amount you are willing to pay per click on your ad and then submit your credit card. You advertisement will then go live once the credit card is approved. Every time someone clicks on your ad, Google bills your account. Every couple of weeks or when your bill reaches a certain amount, Google will actually charge your credit card. Adwords is known as a form of pay-per-click advertising.

The Google AdSense program differs in that it delivers Google AdWords ads to individuals' websites. Google then pays web publishers for the ads displayed on their site based on user clicks on ads or on ad impressions, depending on the type of ad.
Google Adsense is essentially the other side of the coin. There are non-search engine sites on the web that get a lot of traffic and Google trusts. This site is one, but it is hardly an exclusive club. With Google Adsense, these sites are able to set up accounts with Google and list advertisements from Google Adwords on the sites.

You pay Google for to place Adwords on Google’s system, but Google pays you to put Adsense on your site.