Question

what does the word precedent mean?
a decision that is controversial
a decision that guides future decisions
a decision that is good or helpful

Explanation:

In legal and general usage, a precedent refers to a prior decision or action that serves as a standard or guide for future similar situations. The other options do not match this definition: a controversial decision is not the definition of precedent, nor is a solely good/helpful decision.

Answer:

a decision that guides future decisions