| uniform resource identifier | a string of character used to identify a resource: most commonly on the internet. |
| payment threshold | A payment threshold is a term used in affiliate marketing to describe a minimum amount that the affiliate has to earn before the payment is issued. |
| search engines | The websites that allow you to search the web. |
| latent semantic indexing | LSI means that search engines will index commonly associated groups of words in a document. Not all searches involve one specific word, and most them will consist of at least three together. Search engines will analyze the content on your page and search for these groups of similar words to support your main keyword, and this will help boost your ranking. |
| macro opacity | Noun phrase. The measurement of group-level opacity (q.v.). |
