@subbalakshmid2001 have you already gotten started? If yes, what have you tried so far? What results have you seen?
I don’t personally do much with affiliate marketing on Pinterest, but I’ll drop you a few links where you can begin to learn more basics.
Here is Pinterest’s Community Guidelines document. There is a section toward the end called, “Affiliate guidelines” and it will give you some basic info about the “rules!”
This thread also mentions the programs that are currently supported for adding affiliate tags to Pinterest Idea pins:
I hope these resources help a bit!