Received a proposal from a website saying they will link to your recruitment site from their website as long as you also link to them from yours? If you do it solely for the SEO value, don´t bother.
For a long time, these so-called “reciprocal links” were a handy way to quickly improve the SEO of a new site. The idea is as follows: your position in Google search results is linked to how much authority your website has online; one way Google measures authority is in the amount of links to your website from other sites. Some websites created a business model around reciprocal links where they were linking to sites that in turn linked back to theirs causing the authority of both websites to go up.
This has changed recently. Google now discounts all reciprocal links. The algorithm has been altered to identify the exchange of links by two parties for the purpose of increasing their number of inbound links. Google did this since the concept of reciprocal linking went against Google’s original intention with the algorithm: quality content should attract links. They see the exchange of links as nothing more than a mutual agreement to unjustifiably promote others’ website with the end goal of promoting your own. Google doesn’t particularly like this. That does not mean you cannot link to other sites when they have a link on your site as well, just that it no longer has direct SEO benefits.