| deep link ratio | The deep link ratio is the percentage of hyperlinks that point to other pages than your homepage. If you had 100 pages and 60 were pointing to pages other than your homepage, your deep link ratio would be 60%. |
| reciprocal links | When two websites agree to exchange links to one another. |
| supplemental index | Supplemental Index refers to Googles secondary database containing pages considered to have less importance. The importance of a page is measured by the number of links pointing to it. If, according to Googles algorithm, a page is depreciated, it will not pass to the target page. It will appear on a supplemental page that will rank in search results only if there are not enough pages in the main index. Supplemental results are rarely rank and, thereby, they dont pull much weight in Google. |
| bow-to-stern latency | Noun phrase. The amount of time that elapses from when a search engine caches the deepest reachable page after the last time it caches the root URL of the site. |
| link churn | The measurement of lost links within a specified time period. |
