Why are there links in the tag on the site?

Question

Search Engine Optimization

Hello, I am studying SEO on the example of large sites.
The Profi.ru site is well represented in the keyword search by similar pages: profi.ru/remont/santehnika/ I
started to study relinking and noticed a strange thing for me.
On the pages of their blog articles there are thematic blocks with links to pages like profi.ru/remont/santehnika/
but they are enclosed in a tag

<noindex><a style="text-decoration: underline;" href="/remont/santehnika/" target="_blank" rel="noopener">Сантехники</a></noindex>

for example here: profi.ru/blog/o-chyom-vy-mozhete-zabyt-vo-vremya-remonta/ Tell me
, why is this done?

Answer 1

https://www.google.com/search?q=noindex
the first link answers the question https://ru.wikipedia.org/wiki/Noindex