The quick and dirty explanation: https://elanthipedia.play.net/Experience_command (scroll down to bonus)

It works by playing. So if you scout, you will gain bonused scouting. I think of it as getting an RPA to learning in those skills until the bonus pools empty. You can control when it works by toggling it on and off.

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EXP BONUS
This command is used to manage the skillset bonus experience pools which were created due to the changes in skills with the release of DR 3.0 in January 2013. Many skills were combined or eliminated, and any experience a character had earned in the old skills which was not transferred into a new skill was placed into bonus pools. There is a bonus pool for each of the five skillsets. Whenever you absorb field experience in a skill, you will also absorb an equal number of bits from the bonus pool for that skillset, until that pool is empty. Effectively, the bonus pools mean you are absorbing twice the experience for each pulse for as long as the pools remain. In this way you are essentially being paid back the experience you lost when the eliminated skills were removed.

The pools can selectively be toggled on or off to control when you drain experience from each. There is no time limit on using experience from the bonus pools.

Nikpack

>>Your Survival pool could fill 74 empty skills to 200 ranks

>Holy crap

Yeah, he really slacked off, didn't he?

Nikpack