Affiliate programs are forms of business cooperation supported by various companies in order to promote their products and services. It's simple: you become a “partner” (this is usually free), then you post sponsored links of this or that company on your website. When someone who follows your link buys a product or service from the relevant company, you will receive your percentage of the profit.
Step 1. See what is currently in greatest demand (say, using Google Trends)
Step 2. Use Google Keyword Research Tool to move from general to specific in your niche of choice
Here's an example: weight loss is a popular niche, but too general. But weight loss for a vacation, wedding, summer, after the holidays, for a birthday, and so on - these are no less popular, but much narrower niches.
Step 3. See how many people are interested in this or that niche by entering in a Google search the phrase, say, "fast weight loss" (just like that, in quotes)
Thanks to the quotation marks, you can see how many sites there are on the network dedicated to this topic. look for a niche for which there are fewer than 5,000 results.
Step 4. Create a website on the topic of your choice and place a lot of relevant information there to attract visitors
Send them a newsletter asking them to buy a particular item.
Step 5. You can do affiliate marketing without a website
In this case, articles will become your tool. What's the point: You write an article about a product or service and post it in a free article directory. The main thing is not to forget to insert your affiliate program link into the article (unless, of course, this is prohibited by the catalog rules).
Step 6. See what “long tail keywords” are on your topic
Long-tail keywords are essentially phrases. If you are selling products for weight loss, then the phrase "weight loss" is too long, for this phrase the wildest competition. You should use more specific, narrower keywords: “weight loss in 2 weeks” or “weight loss for the wedding”.
Step 7. Correctly use keywords in articles
Place them in the headlines, in the first few sentences, and further down the text to make it easier for search engines to index your article.