Gradient mesh - framework that we move gradient on top ofd
Decide how many mesh points you want - use mesh tool - jusat above gradient -
apply mesh tool in several areas, doesn't look like much until we apply colour. Can change shape of mesh with white arrow.
Select anchor point and apply colour, gives a gradation of colour - should blend smoothly.
Mesh tool can also be applied to a line, but you don't have as much control - hover mesh tool over line and then pull it, and play with colours etc.