Thanks for the explanation. I'll check out the link you provided. I understand that many tags are self explanatory but if I don't come across the tags, I won't know they exist. For example, I had already posted an introduction of myself without using #introduceyouurself. I didn't know it exists. When I later found out about it, I had to edit the post and include the tag.
So, what I am actually looking for is a list of all the tags that exist on the platform. I can easily figure what each of them is meant for. All the same, thank you so much for taking the time to explain things to me.