Why it matters when you are writing
Since its eighth edition, MLA has stopped publishing a separate template for every kind of source. Instead you assemble each entry from nine core elements in a fixed order: author, title of source, title of container, other contributors, version, number, publisher, publication date, and location. A journal article and a podcast episode look different on the page because different elements apply, not because you looked up two different recipes.
“Container” is the concept that trips people up. The container is the larger work holding the source — the journal that holds an article, the anthology that holds an essay, the streaming service that holds an episode. Some sources sit inside two containers, and MLA handles that by letting you list the second after the first, which is why a database-hosted article ends with the database name and the DOI.
Before you submit, run the two-way check in both directions. Every parenthetical citation should find an entry that begins with the same word — the “first element” — because that word is what your reader scans for. Entries that no citation reaches do not belong on a Works Cited page at all; move them to a bibliography if your instructor wants one.