I was looking at the help's account page https://e621.net/help/show/accounts and it mentioned at the privileged user section the use of tag suscriptions. What are those?

It has a link to a help page but it seems to be broken.
(Also this is my first time creating a post in this forum, Should I ask this kind of stuff in here?).

Brx654 said:
I was looking at the help's account page https://e621.net/help/show/accounts and it mentioned at the privileged user section the use of tag suscriptions. What are those?

It has a link to a help page but it seems to be broken.
(Also this is my first time creating a post in this forum, Should I ask this kind of stuff in here?).

Here's the help page via the wayback machine:

With a privileged account you can subscribe to a group of tags. A background process runs every 15 minutes to refresh your tag subscriptions providing you a listing of the 200 most recent posts matching your tags. You can think of a tag subscription as a bookmark to a tag search, but coupled with the full power of e621's tag query engine.

You can create up to five groups and each group can have up to 20 tags. Any tag that works in the post listing will work with tag subscriptions, which means any metatag will work. You can even create tag subscriptions based on other people's tag subscriptions.

You can search your own tag subscriptions using the sub metatag from the main post listing. To search for Arcturus's tag subscriptions for example, search for sub:Arcturus. To search Arcturus's klonoa tag subscription group, you can search for sub:Arcturus:klonoa. Because the posts are rendered through the main listing, you can also view the Atom feed and all API calls will work as expected. And like any other metatag, you can combine it with other tags (to a degree).

The one caveat is that e621 performs a union search on all your tags. You can't, for example, search for all posts matching "klonoa" AND "rating:explicit".

To edit your tag subscriptions, visit your user settings page.

HOWEVER, according to others, the subscription feature has not worked for years. Probably the reason why they deleted the help page to begin with. So for now, I'd consider it a dead/old feature that no longer functions. Perhaps one day it will be fixed. For now, an admin should probably edit the users page and remove that bit since it's no longer applicable since the function is unusable.

it has not worked in years and all leftover visuals of it were removed year ago
(see the removed section) https://e621.net/forum/show/242806

so its not just dead/non-funct, its removed feature.