| compression | Data compression is used to reduce the bit size of files, without necessarily affecting its quality. Its useful on the web, as the lower a file is in size, the faster it will download. For example, a CSS file could contain attributes of a HTML class written separately, like this: .class {font-size:12px;} .class {font-color:red;}. A compressed version would look like this .class {font-size:12px; font color:red;}. Images can also be compressed. This process is referred to as Image Optimization. |
| extensible markup language | (XML) Allows for the simple formatting and syndication of content through technology like RSS. |
| hijacking | Tricking a search engine into thinking a different website exists at a given URL. |
| keyword spam | This is the practice of using the same keyword excessively within a site. |
| mobile speed | The amount of time taken for a web page to fully load on a mobile device. Search engines place increasing importance on mobile speed, with Google having announced it as a ranking factor. |
