A number rarely explains itself. Revenue, a closing price or a growth rate becomes more meaningful when you know what it measures, when it was recorded, and what you are comparing it with.
Make comparisons like for like
Check the unit, currency, reporting period and definition behind each figure. A quarterly figure should not be compared directly with an annual total. Similarly, companies may report measures differently, so read the definitions before treating them as equivalent.
Understand the source and timing
Financial information can be revised, and different sources may update on different schedules. Note the date of the observation and the date it became available. When a figure is material to your work, check the original filing or disclosure.
Look beyond a single measure
A growth rate can look impressive when it starts from a small base. A valuation multiple can be difficult to interpret without understanding the underlying earnings. Pair measures with their components and examine several periods where possible.
Context does not remove uncertainty. It makes your assumptions clearer and helps you ask more useful follow-up questions.