What hasn't changed:
What the big changes are:
The containers concept is most of what's new about MLA 8. A container is a larger whole that "contains" one's source. For example, for an article in a journal, the article is the source and the journal is the container.
Many sources have more than one container. For these sources, add the information about the second container after the information about the first container.
Examples of sources with two containers:
For specific examples using the containers template, see the MLA Style Center.