Why did Puritans call themselves Puritans?

Puritans called themselves "Puritans" to signify their desire to purify the Church of England from what they viewed as remnants of Catholicism and other practices they considered corrupt. They sought to simplify worship and promote a more personal, direct relationship with God, emphasizing moral integrity and piety. The term reflected their commitment to reforming both church and society according to their strict religious principles.