Access the page you want to edit in your preferred web browser
If you have edit permissions on the page you will see an Edit icon (pencil) at the top right of the page
Click on the Edit icon to switch to edit mode
You can now edit the page
Find the area of the page that you wish to edit and put your mouse over it. You should see an outline around the section and at the top left corner there will be a label to tell you what type of content it is, e.g. Text or Quick links. See the appropriate section below for the type of content you need to edit.