Word processing software is used to manipulate a text document, such as a resume or a report. You typically enter text by typing, and the software provide tools for copying, deleting various type of formatting.

Word processor is an electronic device or computer software application, which performs the task of composing, editing, formatting and printing of documents. 

Some of the functions of word processing software include:

Creating, editing, saving and printing document
Copying, pasting, moving and deleting text with a document
Formatting text, such as font type, bolding, underlining or italicizing
Creating and editing table
Inserting elements from other software, such as illustrations or photographs.
Correcting spelling and grammar.