What is the weed in my lawn....

[davis1862]

....and how do I get rid of it?

[applestar]

Do you mean the clover?

I'll let someone else answer how to get rid of... we love clover in our lawn. Great for honeybees when in bloom, nitrogen-fixer so the rhizobium/root nodules as well as the chopped up leaves feed the grass especially when using mulching mower = less ...practically no... fertilizer needed.

[rainbowgardener]

Agree, the round leaves are clover. Before people started demanding golf course style lawns, grass seed used to be sold with clover seed mixed in, because it is so good for the lawn. And as applestar says, honeybees love the little flowers if you let it bloom.