| content-rich doorway | Noun phrase. A doorway page dressed up with graphics, navigation, and linked to from a site map so that it looks like a normal part of a Web site. The copy is written to rank for a single keyword expression. |
| google adwords | Googles platform for allowing advertisers to display ads in their SERPs or through their display network. |
| local data aggregators | Large businesses that collect and sell verified phonebook data |
| index | A huge database of all the content search engine crawlers have discovered and deem good enough to serve up to searchers. |
| 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%. |
