What does proxying links to external sites give?

Question

Search Engine Optimization

Hello, when you place a link to your site on a third-party resource, the third-party resource offers to proxy this link. What does this do for my site in terms of SEO, weight transfer, and other things that affect my site's trustworthiness?
Comment on the website:

All external links found in the material will be proxied through the site domain (example: example.com/go?http://www.anysite.com/), so the site will not lose its significance in search engines. This is very useful in terms of search engine optimization.

Which site will not lose, which site is useful? The whole Internet is full like: "Image proxying helps when inserting http to https, then the error does not appear. Link proxying removes the referrer, it seems. Well, all views and transitions through the proxy are logged."
What? What are we talking about? What to choose? Should I link my links to a third-party resource or not?

Answer 1

when you place a link to your site on a third-party resource, the third-party resource offers to proxy this link

My profile indicates in sufficient detail what I do, so I can’t call myself a super-specialist in SEO, however, in my opinion, the statement above smacks of a divorce.
Previously, this was called a redirect, and when using it, the reference weight was not transferred. Those. The search engine interprets the link formally, and it points to the same site where the robot is located, and not to yours.
Maybe now crawlers have learned how to process such links correctly, but this should be clarified with various Platons if they agree to tell such details.
I don't think that "proxying" will be a plus when buying external links. Rather, on the contrary, the site owner is insured against pessimization, which may occur due to too many links (possibly irrelevant).
In my opinion, it can be a plus if you place external links on your site in this way, and even then I would advise you to study this issue further. Perhaps in this case it is better to add constructions like rel="nofollow"and / or rel="external".
Google generally already has rel="sponsored"for paid links or promotional materials.

Answer 2

You can use this trick on your site for outbound links, but I wouldn't bother. If these links are included on your site, then they are less useful than regular links without any proxying.
Therefore, to the question "What is the effect of proxying? If a third-party site puts a proxied link to my site"
The answer will be: "The SEO effect of such a link is minimal compared to a regular link."