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whats spamming tags , tell me , i can not understand

Sure - this post isn't about #Steemit or #Bitcoin it is about #Iota, by using those first two tags, you add unrelated noise and make it harder for users actually posting about those topics to get visibility.

he is saying that your post does not belong in the tags that you set on your post.
#bitcoin, #steemit

he would prefer you to suit more suitable tags

He might be wrong, he might be right, you make up your own mind.