Explain What is meant when referring to a mercator projection?

The Mercator projection is a cylindrical map projection that represents the Earth’s surface on a flat plane. It distorts size and distance, particularly near the poles, making landmasses like Greenland appear much larger than they are relative to equatorial regions. While it preserves angles and shapes, it is primarily useful for navigation, as it allows for straight-line courses to be plotted easily. However, this distortion can lead to misconceptions about the true size and scale of geographic areas.