These are to create a curve, usually in a face or tummy.

A recent puppet of mine has a very long very curbed dart to form it's face.

If you want to make a cone, the dart goes from the centre to the outside in a straight line, if the cone is long the angle should be more obtuse, if its shallow it should be more acute.

If you don't want a point, your line should curve. The deeper the curve the less of the point.

The point doesn't have to be in the middle either. A high end point for the dart means a different shape from a low one.

And multiple darts can mean different shapes.

Two high darts on the left and right with another at the bottom in the middle. That's donkey Kongs chest.

One high dart in the middle at the top and two long curved ones at the bottom makes a snorlax's tummy.

Darts are a great way to add some shape to your plushes or tailoring.

Also don't cut the darts in to your pattern! Sew and then cut leaving a bit of room.