A special HTML tag that is in the header section of the html page and is not seen but provides important information about the web page. Unlike normal HTML tags, Meta tags do not affect how the page is displayed. These tags provide information to aid search engines like keywords, descriptions, author information, expiration dates of pages and even how often the page is updated.

An open source relational database management system that uses Structured Query Language (SQL). It is pronounced “my ess cue el,". Because it is open source, anyone can download MySQL and tailor it to their needs in accordance with the general public license. MySQL is noted mainly for its speed, reliability, and flexibility.