The Text Editor is used to edit the content of the page or post of your WordPress website. Besides helping in editing text, it also has options for changing fonts to bold, italic and alignment options, It also has option to add links and anchor text. 

It also offers some extra features to add HTML directly. You can also add images, tables, graphs in the content of your WordPress website.

The Editor is also present in the WordPress admin Dashboard where you can edit your theme files. You can write HTML , PHP and CSS code in this admin text editor.