What is lol staff members email

I know there is many threads about this but i don't get it when it says [email]support@riotgames.com[/email] what does it mean when it has the [email] and [/email] do you what does it mean?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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