The best free traffic sources for CPA affiliate marketing, in my opinion, are as follows:
- Social media; possibilities are endless here, most of the web uses Social media — YouTube, Facebook, Twitter, Instagram. …
- SEO; create a website, blog, or something similar, and optimize it for SEO.
The best free traffic source would be from Google with SEO as the conversion rates are high. However, it requires time and money to do SEO for your site and it takes some time to rank.
Here are other alternatives:
1. Facebook
2. Instagram
3. Youtube
4. Quora
5. Pinterest
6. Reddit
7. Blog commenting on high traffic website
8. Forums related to your niche
Each platform has its strategy. You can watch this video to learn more about how to drive free organic traffic.