A hanging indent is where all the lines except the first are indented.  They are used when creating the full citation of a source.  Here are the steps to create a hanging indent when using microsoft word or google docs. 

Microsoft Word

• Highlight your citation
• Right click the highlighted text
• select Paragraph from the drop down menu
• In the paragraph window go to Indentation.  Under Indentation go to the Special option and select Hanging.  Also, make sure that the indent is 0.5" under the 'By' option. 
• You citation should now have a hanging indent

Google Docs

•  Highlight the paragraph you want to indent
• In the menu bar, click “Format.”
• Hover the cursor over “Align & indent” 
• In the drop-down menu, click “Indentation options.”
• Under “Special indent”, click the drop-down selection menu, and select “Hanging.”
• The Value to the right should read 0.5; if it doesn't, type it in
•  Click the blue “Apply” button,