Full explanation
MVP means Minimum Viable Product. It is the simplest version of your product that solves the core problem and that you can put in front of real users.
The goal is not to be perfect. The goal is to learn fast. You want to know if people actually want what you are building before spending months on extra features.
A good MVP focuses on one main feature, skips everything optional, and ships in days or weeks rather than months.
Concrete example
You want to build a meal planning app. Your MVP is a simple form where users enter their goal and get one weekly menu by email. No app, no account, no payment. Just one feature to see if people care.