This feature allows you to load multiple images to share directly from the Publisher.
To add multiple images to a post you just have to click on +Add Photos and choose the pictures you want to add or you can also drag and drop the pictures to the +Add Photos button. Then, you will be given two options:
You can either Publish all Images on a single post, which is available for Twitter accounts (up to 4 images) and Facebook profiles, pages and groups:
or Publish every Image on a different post then schedule them using the Predefined Publishing Times.