How to attach referral links to a banner and (or) text?

Question

Referral programs

How to attach referral links to a banner and (or) text?
the task is this: there are offices in which there are reflinks, you need to bind them to the banner, each office has its own link and it is necessary that it is automatically inserted into the banner or text
as a sample - http://my site/?ref=number
instead of Number so that it automatically puts ID number associated with this account
Thank you