A visual representation of the important tags/words on a particular web page. It offers human visitors a way to quickly gauge what the page is about and it helps focus the page content for SEO purposes.
a thumbnail image is a small version of a larger image, usually linked to the larger image. Thumbnails are typically used in web site galleries to allow the user to browse quickly through a collection of images.
In web design, the page title (defined in the TITLE tag) is arguably the most important tag from a web marketing point of view. The page title is displayed in the title bar, right at the top of the browser, and it gives both humans and search engine spiders a quick indication of the contents of the page. The title is typically also displayed in SERP's.
While it is important to have a keyword-rich title tag for each page on your site, the general consensus is that a unique, accurate title is more effective at driving traffic to your site over the long term.
A very broad term that refers to the amount of activity and/or the number of users on a web site. If something is advertised as a "traffic-magnet", the advertiser claims that it can bring many new visitors to your web site.
Affiliate programs work on the basis that a commission is paid by a vendor to an affiliate when the affiliate refers customers to the vendor - for example, 10% of the sale amount. Two-tier affiliate programs do exactly the same, but affiliates also get a (smaller) cut when another affiliate they referred sends a customer to the vendor.