| tracking code | A piece of JavaScript that populates Google Analytics with detailed traffic data from a website. |
| hreflang attribute | HTML tags that tell search engines there are international versions of your website while also indicating the respective languages intended for affected countries. |
| semantic flux | when groups of interrelated domains compete (intentionally, or unintentionally) for the same keyword or phrase. |
| pay-for-performance | Term popularized by some search engines as a synonym for pay-per-click, stressing to advertisers that they are only paying for ads that perform in terms of delivering traffic, as opposed to CPM-based ads, where ads cost money, even if they dont generate a click. |
| banned | To be banned from a Search Engines index is when a page is removed from the Search Engines index. This happens when a site violates or flouts their guidelines and rules. No notification is given when this happens. In some situations, a ban is fixable. |
