A "Zestimate" is an estimated market value for a home, provided by the real estate website Zillow. It uses a proprietary algorithm that analyzes various data points, including recent sales, tax assessments, and property features. The Zestimate aims to give homeowners and buyers a starting point for understanding a property's worth. While the Zestimate can be a useful tool, it is important to note that it is not an official appraisal. The accuracy of a Zestimate can vary based on the availability and quality of data in a specific area. Homeowners are encouraged to consult real estate professionals for a more precise valuation.