Organic customer acquisition is any method of acquiring new customers that doesn't involve paying for advertising. This can include things like search engine optimization (SEO), content marketing, social media marketing, and referral programs.
The main advantage of organic customer acquisition is that it's relatively low-cost. Once you've established your SEO or content marketing strategy, the ongoing costs are relatively low. And, if done well, organic methods can be highly effective in acquiring high-quality customers who are likely to stick around long-term.
However, organic methods can also be slow to produce results. It can take months or even years to build up the necessary SEO or social media following to start seeing a significant return on your investment. And even then, there's no guarantee that your efforts will pay off.