In plain English: the official written document that starts a case. The Petition for Dissolution is the document that starts your divorce; other petitions ask the court for a specific ruling during a case.
What this means for you: If you’re starting a divorce, your attorney prepares the petition and files it with the court. Your spouse will be served — that officially tells them the case exists. Responding has strict deadlines, so act quickly if you receive one.
What’s inside it: the petition names both spouses, states the grounds (irreconcilable differences), and lists what you’re asking the court to decide — parenting, support, property. It is a request, not a decision; the court decides later.
Watch out for: if you’ve been served, you generally have a limited window (often 30 days) to file an appearance and response. Missing that deadline can let the case proceed without your input. Don’t ignore it because you “disagree” — disagreement is what the response is for.