keyword proximity is refers to the distance between the individual keywords of search term's.
It is used by search engine to measure relevancy of a given page to the search request.
Keyword proximity refers to closeness of keywords. Your keywords should be close to each other in content of web page. Many people don’t know about keywords. They generally treats key phrases as a keyword. Usually we do not target keyword.
For example: This post is related to “Keyword Proximity”. The word “Keyword Proximity” is not a key word. It is a key phrase. Here “Keyword” is a one keyword and “Proximity” is another keyword.
The keyword proximity refers to the distance between the search term's individual keywords.The smaller the distance between a search term’s individual keywords, the more relevant it will be from a search engine’s point of view.
Keyword proximity is the arrangement of the density of a keyword and the prominence. So proximity looks at the location of the keyword in the sentence and how often it's being used in that sentence and also takes into version the distance between them.