Does it make any sense at all to salt a hash which might be available publicly?

It doesn't really make sense to me, but does anyone actually do that?

UPDATE - Some more info:

An acquaintance of mine has a common salted-hash function which he uses throughout his code. So I was wondering if it made any sense at-all, to do so.

Here's the function he used:

hashlib.sha256(string+SALT).hexdigest()

Update2:

Sorry if it wasn't clear. By available publicly I meant, that it is rendered in the HTML of the project (for linking, etc) & can thus be easily read by a third party.

The project is a python based web-app which involves user-created pages which are tracked using their hashes like myproject.com/hash so thus revealing the hash publicly. So my question is, whether in any circumstances would any sane programmer salt such a hash?

Question: Using hashlib.sha256(string+SALT).hexdigest() vs hashlib.sha256(string).hexdigest() , when the hash isn't a secret.