| searchmetrics | SEO software. |
| unique visitor | When looking at your web analytics, the number of different people that visit your site in a given period represent unique visitors. |
| churn | Noun. The process by which a search engine regularly or occasionally changes listings in its results due to content or algorithmic factors. Churn is normal for most queries. |
| nofollow tag | Nofollow tag is a meta robots tag that tells search engines not to follow a specific outbound link. Either because of a website doesnt want to pass authority to another webpage or because its a paid link. |
| yandex | The most popular search engine in Russia, Yandex was founded September 23, 1997 by Arkady Volozh and Ilya Segalovich. |
