What is the significance and gameplay mechanics of Lifelink in Magic: The Gathering?

In Magic: The Gathering, Lifelink is a keyWord ability that allows a player to gain life equal to the amount of damage dealt by a creature with Lifelink. This ability is significant because it can help a player stay in the game longer by increasing their life total. In terms of gameplay mechanics, Lifelink can be used strategically to swing the game in a player's favor by providing a steady stream of life gain.