When MLM is enabled on your platform, affiliates can recruit sub-affiliates by sharing their MLM recruitment link.
Affiliates can find this link in one of two ways:
If the affiliate is part of only one program, they would find the link in the MLM tab on the left-hand side.
If the affiliate is a part of multiple programs, they would click the Programs tab > specific program > Clicking on the 'MLM' tab near the top of the page.
In this same page, they can also see the sub-affiliates that have signed up beneath them using the MLM recruitment link.