Birbirine doğal olarak bağlanmanın çok anlamlı olduğu sayfalara sahip, birbiriyle oldukça ilişkili iki sitem var. Bunu, sayfa başına 1 bağlantı olarak açarsam, her iki durumda da binlerce bağlantı olur. Bu konuda bir sorun gören var mı?
Son mesajım spam olarak engellendiğinden bunu basitleştirdim.

If it’s useful to your users to link from one to the other, do it – don’t worry about any SEO effects. Best case, it helps. worst case, they ignore them but users still get value.
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Sitewide links likely won’t garner much of an SEO benefit but having in content links on the strong pages of your website would be worth doing. A link here or there on your more prominent pages will gain more than a sitewide link from a banner or navigation bar, for example.
What you want to do is called cross-page reciprocal backlinks. Edward Strum spoke about this topic in detail in a YouTube video 4 months ago.
You should be careful because your websites are most likely on the same servers, and have what the Grumpy SEO Guy calls a footprint. Google knows you own both sites.
What you rather want is friends with websites, and you then interlink those.
Google knows how hard it is to get legit backlinks from legit websites, and will reward you for your trouble with some ranking improvements.