What strategies can be employed to effectively build and play a swarm deck in Magic: The Gathering?

To effectively build and play a swarm deck in Magic: The Gathering, you can employ strategies such as including low-cost creatures with abilities that benefit from having many creatures on the battlefield, using cards that create multiple creature tokens, and utilizing cards that boost the power and toughness of all your creatures. Additionally, it is important to maintain card advantage and board presence to overwhelm your opponent with a large number of creatures.