As you can see, Target’s revenue rose steadily in this period, while Altria’s top-line sales declined. This view smooths out any short-term fluctuations in revenue that might be caused by seasonal factors or one-time items. With TTM figures, we can get a more accurate picture of a company's ability to perform over a longer period, across various market conditions and economic environments.
This is especially useful for comparing two companies in different industries. For example, a company in the retail industry might see a lot of seasonal effects in its revenue development, while a company in the tobacco industry might not. Target’s single-quarter sales are frequently larger in the holiday-flavored fourth quarter, while Altria customers don’t tend to change their buying habits very often.
By looking at TTM data, we can avoid comparing Target’s seasonal apples to Altria’s steady oranges and instead compare the companies’ long-term performance trends on equal terms.