| source code | A list of instructions that are compiled and assembled to generate an executable computer program. |
| non-reciprocal link | where one site links to another but that site does not link back. |
| html tag | An HTML tag is a set of characters that constitute a formatting command for a webpage and represent the root of an HTML document. HTML tags are the primary tags of a webpage. This tags elements can be used to improve the effectiveness of SEO for webpages and websites. |
| core updates | Core Updates (or ?Broad Core Updates) are Google algorithm updates which are more significant than other smaller incremental updates. Google says Core Updates should be more ?noticeable, and made only ?several times a year. Core Updates should usually be announced by Google via communication channels such as Twitter or the Official Webmaster Central blog. |
| pop-up | An advertisement that is created on top of or within the active browser window. |
