| keyword research tools | platforms which help you to discover which keywords you should be targeting based on search volumes and search trends. The most commonly used is Google AdWords Keyword Planner. |
| pbn | Stands for Private Blog Network. |
| unique visitors | Total number of unique users that have visited a webpage in a given period. |
| comment spam | Poorly written comments, often off-topic and self-promotional, posted by spambots in the hopes of getting a free (but ultimately worthless) link. |
| ffa | FFA stands for Free for all and refers to websites that allow anyone to add a link pointing to their pages. FFA pages have no human intervention and usually they dont weight much in search relevancy as they usually point to low quality website. For example, on an FFA page you can find a sport site listed between art museums and spatial engineering. |
