Definition of the word suited
When we talk about a suited hand, we are talking about two cards that have the same suit. In poker, by suit, we mean heart, diamonds, spades and clubs. So a 2 of spades and a 5 of clubs are not matching cards, even if the clubs and spades are black. A matching hand is any two cards that are spades, clubs and clubs, heart-heart or diamonds and diamonds. A matching hand gains in value since it is more likely to make a flush (or suit). The equity of a hand as a matched AK will be 5% higher than the equity of an unmatched hand.
Demystifying an Urban Legend
In some card games, the suits do not have the same strength. In some games, the spade beats the clubs and the heart beats the diamonds. At the top of the suits is the spade. The ace of spades is therefore the most powerful card in the conventional 52-card deck. On the other hand, in poker, it is not. Whether your starting hand is AK Spades, Clubs, Hearts, or Diamonds, your chances of winning the hand are the same whether you have AK Spades, Clubs, Hearts, or Diamonds as your starting hand. A matching hand increases the playability of a hand, making it a strength.