How to: Basic Squarespace Stuff
Choose Pages, then Projects
Select a report
Click on "Tags" at the bottom left of the window. To add multiple tags, type in the tag name and hit the comma.
Select Pages, then Blog or Projects
Select specific post
Hover over specific post and click "Edit"
In pop up window, across the top right. You will see "Content, Options, Location, Social". Click "Options and enter a brief excerpt. This will appear on the main blog/project listing page. Hit Save.
Go to page, hit edit.
Hover over the text you wish to edit and click.
Click on "files" and "add"