What is experience soaking?

It is thorougly discussed in this reddit post. It describes what it is and how it works, as well as how to perform it properly.

The question:

So soaking XP you have to be a certain distance to the minions that are killed. With any other character this is easy as you're usually right in the lane fighting them. I know with Abathur that if your locusts or mines get the killing blow then you get XP however that is a pretty low chance especially in early game.

How do you soak XP properly with Abathur? I keep seeing people saying to body soak does that mean to throw Abathur out into the lane and not in a bush near the lane? Do I hat one lane and help mow it down and then just bounce around hatting lanes or should I actually be in the lane with Abathur and doing damage and slappin' those minions?

Answer:

There is certainly an art to know when, where, and for how long you can go out into lane to soak.

Most importantly, your vision radius is how close you need to be to dying minions in order to passively body-soak the XP. This aspect is largely ignored by many Abathur players imo.