A settlement agreement formalizes the terms both sides agreed to in order to resolve a dispute without (or in the middle of) litigation. Its entire purpose is finality — which means gaps or ambiguity defeat the point of settling at all.
The release language is the core of the document
A release clause defines exactly which claims are being given up — all claims related to the dispute, or only specific ones. Overly narrow release language can leave a party exposed to related claims resurfacing later.
Payment terms need to be unambiguous
Amount, timing, and method of payment should be stated precisely, along with what happens if a payment is missed — vague terms here are one of the most common sources of disputes over an otherwise-settled matter.
Confidentiality, if it's part of the deal
Many settlements include confidentiality provisions about the terms or the underlying dispute — these need clear scope and consequences for breach, since a vague confidentiality clause is difficult to actually enforce.
Dismissal and court filings
If a lawsuit was already filed, the agreement should specify how and when the case gets dismissed — with or without prejudice — and who's responsible for filing the necessary paperwork with the court.
No admission of liability, if that's the intent
Most settlements explicitly state that the agreement isn't an admission of fault by either side — standard language, but worth confirming it's actually included when that's part of what was negotiated.