A

Address (Web Address / Universal Resource Locator / URL) -

This is a unique address that identifies a website. E.g. yourwebsite.com

AdSense -

AdSense is an advertising program run by Google. Website owners can enroll in this program to enable text and image advertisements. Every time a visitor clicks on these ads, the website owner earns an X amount of money.

AdWords -

The name of Google's Pay Per Click (PPC) advertising program. See PPC for more details.

Algorithm -

Mathematical formula used by search engines to rank web sites. Google became famous because of the quality of its algorithm - this enabled Google to provide highly relevant search results. A search algorithm is any search engines most valuable asset.

Alt Text -

HTML terminology. Abbreviation for Alternative Text, it is an <img> property that is used as a placeholder when the image is loading.

AltaVista -

One of the most popular search engines of yesteryears. Now barely used, and owned by Yahoo

Anchor Text -

This is the actual text part of a link. It is used heavily by search engines as a ranking factor. Instead of using a 'click here for more'� link, it is preferable to use relevant keywords in the link text e.g. 'Additional customer comments'.