Instagram is where most affiliates start, and also where most of them get stuck. The reason is structural: the platform was built to keep people inside it, and a link takes people out.
Where links fit
- Bio: the only permanent one. A single link, so it has to lead somewhere that gathers the rest.
- Stories: with the link sticker. Gone in 24 hours, but converts well because it reaches people who already follow you.
- Caption: not clickable, which is where "link in bio" comes from.
- Direct messages: convert a great deal, and burn out fast if you send to people who did not ask.
The link page: use one that is yours
The usual answer to the bio limit is a link aggregator. It works, but it has a cost few people notice: all your traffic passes through an address that is not yours, and the reputation it builds stays with their platform.
A simple page on your own domain does the same job, and what it builds is yours. If you do not have a site, building one for this takes a weekend.
What the platform penalises
A post that only says click reaches fewer people than a post that delivers something. Tell the essential part right there — what the product is, who it is for, what you thought — and leave the link as a complement.
The limit of Instagram
All of this reaches people who already follow you or whom the algorithm decided to show. It does not reach someone researching that product right now, and that person is much closer to buying.
That is why affiliates who sustain income over the long run have some presence in search — through their own content, through links pointing to their pages, or by publishing in a network like Magneth.