Redirects
There may be times when page addresses change. For example, if you just set-up an icompendium site, Google may still link to your old site pages, for example:yoursite.com/resume.html
yoursite.com/archive/paintings.html
However, on your new icompendium site the page addresses may be, for example:
yoursite.com/resume
yoursite.com/archive/paintings
There are several ways you can deal with pages that no longer exist on the More options > Site traffic > Redirects tab.
Redirect missing pages to home page
Checking Redirect missing pages to home page redirects visits to non-existent pages back to the home page. Leaving this unchecked will display a "Page not found" message. But it will also speed-up Google's removal of this non-existent page from the search results.
Add redirects
Adding redirects is the suggested way to deal with non-existent pages. Click the Add button to enter the Old URL path and the New URL path. Using the examples above, this would look like so:
First, uncheck Redirect missing pages to home page. Then add redirects as needed.