The 'Introduceyourself' tag is only for your first post where you tell others all about you as a new member. Other tags are specific to your post -- for example, if you have a post about what you had for lunch, you can tag it 'food' 'lunch' 'pizza' (if you had pizza for example) 'blog' life'.

Here's how most popular tags are used:
'life' -- anything about your life
'blog' -- when you share about your day
'food' -- anything related to food
'steemit' -- only something about the Steemit website
'introduceyourself' (or 'introducemyself') -- the first post where you tell people about you
'photography' -- a photograph you took

Can you tell me which post/page you read where using the 'introduceyourself' tag in every post was encouraged?