Other View Filter (8.x)

Frequently two views, or two displays of one view, occur on the page together. One common example is a listing of content with a few curated items selected via more specific criteria. It’s simple enough to create two displays and show the curated one above the general listing. This presents a problem: content that appears in the curated list needs to somehow be excluded from the general listing.

Source: https://drupal.org/project/project_module/feed/all