im a total beginner what is this HSK mat i keep seeing?

keep seeing people post this HSK mat with all the things on here

here's a link

https://www.reddit.com/r/ChineseLanguage/comments/c0762q/i_got_the_entire_hsk_word_list_by/

what is this all about? can someone explain like im 5 / out out of the loop? thanks friends

submitted by /u/crunchyshoulder00
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