No explanation of effects or any keywords

[Punto]

No explanation of effects or any keywords in game. What is "Taint" what is "Infection buildup", how does Lifesteal work? do I need to google everything or what? Game is full of frustrations...how are we suppose to make a build when there are no proper explanations?

[Sera]

Taint should be explain on weapons that come with it.

Plague should be explain when you get later game, and it can take effect.

From Patch Notes.

New Endgame Plague System

After the player has completed all of the Breach content, the Plague System will become active.
Interacting with the Plague System
The Plague will infect a zone at random, over time. The player can also choose to purposefully infect a zone by burning items/resources at a bonfire.
The Plague can be cleansed by killing 65% of the enemies within the area and then finally killing the Plagued Boss. Players can also cleanse the entire world of any Plagued zones by visiting the Seneschal within the Cerim Crucible.
Items/Resources can be burned at a bonfire within an infected area to increase the Plague Level, increasing both the difficulty and rewards
Burning a “Torn Effigy” will immediately summon the Plagued Boss


Life Steal is.. kinda obvious? works like most games that have it? (thou ya, its not explain in game outside its brief desciption.