A current COI is often the first document a GC asks for. Tracking it is useful—but it is not the same as verifying coverage.
A certificate of insurance can include the named insured, policy dates, limits, carriers, certificate holder, and notes about additional insured or waiver-of-subrogation requests. What a GC needs depends on the project and contract.
Track the expiration date and start the renewal conversation 30 days out. Follow up at 14 and 7 days. If the date passes, mark the document expired and request an updated certificate rather than silently sharing an old copy.
A certificate is evidence of insurance information at a point in time; it does not rewrite the policy or guarantee that every coverage requirement is met. Ask the GC for exact requirements and ask your insurance agent for the correct certificate and endorsements.