The last part of the URL contains so-called parameters, that is pairs of keys and values. The key is 'ch' in this case, the value '752253556758'.

The server side script can do anything with that value, we can't tell you what it does without knowing the actual URL. (And even if we know it we can just guess).

But why do you want to know that? Sounds like an XY Problem to me.

In reply to Re: Meaning of part of a URL by moritz
in thread Meaning of part of a URL by noob

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