Scan columns at the edge of the page are used to organize navigation links or place some advertisements. You can display both, or only the left or right scan column on your website.
What’s the local navigation?
Large sites often use two types of navigation:
- global navigation with links to the main sections of the site
- local navigation to display the list of subsections in the current section
Where to place it?
The left scan column is usually used for local navigation. People expect it there. You can use right navigation columns as long as it is consistent.
What are advertisements?
The right scan column is often used for advertising. But lots of users are banner blind. They ignore areas of the screen that usually contain advertising. If you don’t use the scan columns for advertising make sure the content in the scan columns has nothing in common with anything looking like a banner.