What are map legends?

A map legend, also known as a map key, is a small box or section on a map that explains the meaning of the symbols, colors, and lines used on the map. It helps readers understand what different symbols represent, such as roads, rivers, mountains, or buildings. For example, a blue line may represent a river, while a red line could indicate a road. The legend is essential for interpreting the map correctly, as it provides the necessary information to understand the features shown on the map. Without a legend, it would be difficult to read and understand a map accurately.

This question related to Chapter 1 Social Science Class 6th NCERT.
From the Chapter 1. Locating Places on the Earth.
Give answer according to your understanding.