What is a comma used for?

Commas, colons, and semicolons can all be used to connect sentences together. The comma is often the punctuation mark that gives writers the most problems. It has many different uses and often requires good knowledge of grammar to avoid making mistakes when using it. Some common uses of the comma include:

Why is a comma a useful punctuation device?

The comma is a valuable, useful punctuation device because it separates the structural elements of sentences into manageable segments. The rules provided here are those found in traditional handbooks; however, in certain rhetorical contexts and for specific purposes, these rules may be broken.

What is a comma in English grammar?

The comma has several uses in English grammar, all related to marking-off separate elements within a sentence.