That is bad highlighting. It seems completely random. The highlighted portions should form some kind of sense when read by themselves or should be only the most important words. "Shield absorbs negates health." What?
This is better highlighting:
Each ()Shield absorbs a certain type of damage. That is, it not only negates the damage, but also adds it to your health!
Shields ... add to your health
alt.
Each ()Shield can absorb a certain type of damage. That is, it not only negates the damage, but also adds it to your health!
(don't highlight Negate, it is confusing because the damage is not actually nulled / negated / immune)