Your minions provide you with many advantages. They will provide you with some cover against enemy skills like Kestrel's Glimmershot. They will also help you destroy the enemy team’s turrets.
If you have minions with you when attacking the enemy turrets, the turrets will attack minions instead of you! However, remember that the turrets protect their heroes and will make you their target if you damage a nearby enemy hero!
Your minions will grow stronger as the game time progresses. A good way to stall your lane to give you time to go shopping or help out down in the Jungle is to boost your minion wave with a Minion Candy before you leave the lane.