The keyword proximity refers to the distance between the search term's individual keywords. For example: a website contains the keywords that make up the search term “dentist Boston implant” in the heading “Your professional dentist in Boston; dental practice for minimally invasive implants”.
Keyword proximity is the distance between the search terms. For example, the keyword proximity of "on page techniques" from the keyword "on page SEO techniques" is 1 because there is one word SEO placed between them.
Keyword Proximity is an important part of content optimization. It refers for the distance between words of a keyword in a phrase. 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.