If you are referring to an epic poem, such as , the title is italicized.Company names are treated the same as an individual’s name and are not italicized nor placed in quotation marks. Often writers will ask it you underline books titles, underline movie titles, underline show titles, underline article titles, or underline song titles.
When writing about other works, it's hard to decide when to underline (or place in italics) a title and when to place it in double quotations.
Note that some publications have a "house style" that must be followed.
Here’s an example: Article titles are treated much like an episode of a television show.
When discussing the article it is placed in quotation marks.
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It should be pointed out that there are no hard and fast grammar rules for formatting or punctuating these items; they are a matter of style.
Technically a writer can use any formatting they wish, but adhering to a particular style helps ensure readers fully understand what the writer intended.
Whether to italicize depends on whether you are referring to the series or an episode.
The series title is italicized; the episode is in quotation marks.