Aviation charts are designed to assist pilots with the navigation of aircraft. With aeronautical charts, aviators can quickly and easily determine their position, potential routes to a destination, safe flying altitudes, visual navigation aids and emergency landing spots. Aviation charts also contain radio frequencies and information about different types of airspace.
Aeronautical maps are designed for visual flight rules (VFR) or instrument flight rules (IFR). VFR flights are usually limited to some recreational and commercial flights. However, many pilots, most airlines and large commercial aviation companies use IFR navigation at all times.
While most charts are now available in digital format, it's still a good idea to carry a paper backup!