Reciprocal links have several advantages. First of all, if the linked page is a popular article, you can send the customer to the linked page as well. If it is relevant to the linked page, users may be interested in and subscribe to your linked page.
You can also expect SEO effects if you have healthy reciprocal links, which can increase your page rank. “Healthy” is a reciprocal link that is not considered spam. If the link is obviously unnatural, it’s quite possible that you’ll be penalized by Google, downgraded, or in the worst case excluded from the index. Let’s be careful.