What is MERN Stack?

pspan id=docs-internal-guid-b705e382-7fff-2b92-24a7-059187b66e93span style=font-size: 12pt; font-family: 'Liberation Serif'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;Understanding the MERN stack, its components and how is it different from the MEAN stack./span/span/p