You can start figuring out your target audience by focusing on reading the reviews in your niche. You can also spend some time on forums and read the comment section on blogs that cover your niche topics. If you notice some unanswered questions emerging over and over again, write them down. Your audience needs them answered, and you can do it for them. Or you can do an online search for best niche blogs and see how they are structured.
This is especially important when you consider intent. If you use a hashtag like #instantpot when promoting the Instant Pot in an Instagram recipe post, there’s a good chance you’ll get exposure to fellow Instant Pot affiliates or people who own Instant Pots already. It's fine to include it, so long as it's just one in a long list of more relevant hashtags.
I’m very happy that I come across to your site. I would like to start working from home using Pinterest and affiliate marketing and your text here is really supportive. I also have the same issue like Jelena, related to the country where are you from. Actually, not all programs are available to all countries, and that is a huge problem. As an example, today I have tried to get an affiliate link of an adobe cut pro program but my country is not on their list. But nevertheless, I think that we should be persistent and follow good and successful as you are. Thanks for the text.