An editor is a miniature word-processing application that is built into Joomla!. It gives you a simple means to edit your content and apply formatting.
Joomla! comes with a default editor called TinyMCE. The TinyMCE editor is a good starter editor and provides basic colors, formatting, and a few other essentials.
One area that can trip you up is writing a beautiful article in Word, cutting, and pasting it into the editor and it looks horrible on site. TinyMCE has the ability to 'paste' into it using a WORD import function. However, there are many other editors which offer better features.
There are some commercially available editors that offer a higher level of word-processing type support, making it even easier to manage ...