please esplain, is google AdWord similar to Adsense ?, in what wat it is defferent can the two catagorzed as pay per click advertising
They are the opposite sides of the coin. Adwords - you pay Google to show your adverts Adsense - they pay you to publish adverts.
Magda is correct, i will break it down a little more for your clarity: AdSense: You allocate space on your website to show adverts supplied by Google on your website (you decide which type, image, video or text) and then get paid for these by Google based on either how many people see or click on the adverts on your website. AdWords: You set up an account with google to advertise either on Google - the search engine and optionally the search partner networks like ask.com, and the Google Content Network (millions of sites who all have space on their website dedicated for AdSense distribution). With this content network, you either let Google decide which sites to show the adverts to by using keywords to give a theme to the advert so that it can place it accordingly, or you choose which sites to display them on. You then pay for this based on either how many people view the advert or click on it (this deends on how you set up your campaign). Hope this helps.
The Google Adword's content network is where businesses go to pay to advertise on any sites that have Adsense ads. So, if you own a website you may want to put Google Adsense on it, because you will get paid per click.
Adwords: You advertise your site on it. You pay money. Adsense: You put on advertisement on your site. You get money.
People pay money to advertise using Adwords, those advertisements will be shown by Adsense unto the relevant sites. In short, the money you earn using Adsense is from the advertisers who used Adwords.