Hello everyone! Thank you for inviting me into this talk @adeljose 😊I apologize for taking the time to come back here responding to this post.

For me, label/tag is important so your readers or curators could find your post easily on steemit.
For example, we in Newcomers' Community have a program for newcomers that we called, Newcomers Achievement Program.
In order for our curators for each achievement task to find the post fo specific achievement, the newcomers have to put the specific achievement tasks' tag, here we make it #achievement1 for their achievement 1 tag.
This makes curators work easier and also for other readers to see the post that related to the Achievement 1 task.

Another advantage to have relevant and related to your content tags/label is so the community members can sort out content that they want to see/look for.
For example, if they want to read/look for content regarding art, they can just look for the tag #art in the search bar, for example, I provided the "How to search with a tag on steemit " below
(http://g.recordit.co/i4AOPHsqbP.gif)

I hope this helps with the importance of label/tag on your content in steemit. Just try to not putting unrelated tag to your content to attract curators, unless they allow you to do so.

Steem On!
😃