It's perfectly fine to exchange backlinks with niche relevant sites. In fact, it can be beneficial for both parties involved. By exchanging links with other websites in your niche, you can help improve each other's search engine rankings and visibility. This can lead to more traffic and exposure for both websites. Just be sure that the link exchange is reciprocal, and that the link you're exchanging is relevant to your website's content. Otherwise, it could harm your website's reputation and ranking."