To add a new article into your Joomla site:
Log into the back end. Click Content >> Article Manager (See Image 1).
In the Article Manager (Image 2) click New button that appears at the upper right hand side of Article Manager.
New Article opens up
Type in Title (alias will fill in automatically) See Image 3.
Select a Section and a Category
Type or paste in your content in the editor. (Image 4) If you are pasting text from Microsoft Word, click on Paste from Word icon in editor. If you are pasting from another web site (where the text can be formatted) click on Paste as Plain Text icon.
Dont forget to click the Save button at the top right when you are done.