The question you ask belongs to a specialised area, here IT. 'cos I am not a specialist in IT, I cant give ya a detailed answer . As far as I know, this is an option available in vBB ( If I dunt mistake, vBB is used to create forums, let's take this 4rums as example )
You can read this conversation ( in a IT forums) to understand this option more clearly.
Ability To Disable Auto-Parse Links Option In Vbulletin
Wiseone: I would like to REMOVE the ability for certain members to be able to click the button to automatically parse links when posting. I cannot find a good way to do this and surely you all could do this for us...
Automatically parse links in text ( make that a no-no )
Oleg: Do you mean vBSEO's feature "Automatically retrieve titles from external links" or vBulletin's feature "Automatically parse links in text"?
As far as I know, "Automatically parse links in text" option is available for those who has bbcode allowed.
and "parse" is defined ( from the Cambridge dict ) as follows :
verb [T] SPECIALIZED
to separate a sentence into grammatical parts, such as subject, verb, etc.
Hope this help ya.
Student or Learner