You will have to register with these Multinational Advertising Websites, by visiting their websites, so that they have your Email ID, where they can send you the assignments. The registration form for all such websites will be found in the links to these websites. They will send to you. Then depending on the category you choose, those websites will send paid mail to you that shall contain a link to advertiser’s website and you will be paid to click the link and visit the advertiser’s website and stay there for a few seconds. You may also have to click on some banners and fill some survey forms in which your personal interest, hobbies, etc, would be asked and do other such work, varying from site to site.