User blog comment:UnofficiallyRed/Ranking of legendaries ever since the 12/2/18 balance change/@comment-33560940-20180219164927

"it should surprise you, I do feel there are many meta cards that are actually not that good"

META - abbreviaton for "Most effective tactic available". If a card is META, that means it is very good and effective. if they were "Not that good", they wouldn't be used on higher arenas because they weren't effective.