A vehicle history report gathers what various organisations have recorded against a single VIN: title and brand records, reported accidents, auction appearances and sale listings, recall notices, and whatever service records have found their way into shared databases.
No report is complete, and any provider claiming otherwise is overstating. Records exist only where somebody reported them. Repairs paid for in cash, accidents never claimed on insurance and servicing done by an independent garage frequently leave no trace at all.
The right way to use one is as a way to rule things out and to generate questions, not as a certificate of condition.
Why it matters
It surfaces the history a seller either does not know or would rather not mention, for a fraction of the cost of the problem it uncovers.
How to check it
Run the report before you travel to view a vehicle, not after you have decided you want it.
Does this apply to the car you are looking at?
Run the VIN or plate and see what is actually on record.
Related terms
Definitions are general guidance, not legal advice. Title rules, total loss thresholds and inspection requirements are set by each state and change over time, so confirm the position with the motor vehicle agency for the state the vehicle is titled in before relying on it.