To add new site content, simply go to the Edit (pencil and paper) menu and choose an option!
Articles are like news posts that appear in a news feed on your front page. They are typically used for time-sensitive updates or announcements.
Pages are more permanent pages you'll want to keep in the same place all the time, like your policies, mission statement, schedules, or anything else you'd like to have in your menu bar.
Photos can go straight into a slideshow on your front page. You can even have multiple albums and choose which photos go where!