On this tab, the user is able to import rubrics from other users either by their email address or by their share code. For you to be able to import a rubric, the owner must have enabled one or both forms of sharing under the Share tab in the Rubric Manager. More information about sharing can be here.
To import a rubric by email address, simply select "Get Rubrics from Email" and enter the e-mail address of the user you know has a rubric you would like to import and click Load. You will see a list of rubrics that user is sharing and can choose which ones you'd like to save to your own account.
To import a rubric by sharing code, simply select "Get Rubric with Code" and enter the code which will be provided to you by the owner of the rubric. If you do not know the code, you will have to contact the owner of the rubric to get it.