On March 20, 2015, we observed a partial solar eclipse. How does it differ from complete?

A solar eclipse is an astronomical phenomenon, which consists in the fact that the Moon obscures (eclipses) the Sun in whole or in part from an observer on Earth. If the Moon completely blocks the Sun from an observer on Earth, then a total solar eclipse will be observed, and when the Moon partially covers the Sun from an observer on Earth, then a partial solar eclipse will be observed. A solar eclipse is possible only on a new moon, when the side of the Moon facing the Earth is not illuminated, and the Moon itself is not visible. During the year there can be: either 2 lunar and 5 solar eclipses, or 3 lunar and 5 solar eclipses.