Bid boards typically pull in the same core data any bid opportunity would have: project title, owner, location, bid date, and a link back to the documents in that agency's plan room. The documents themselves usually still live wherever the issuing agency posted them. Coverage and data quality vary widely between services. No single bid board captures every opportunity in a given market, which is why many companies subscribe to more than one, or supplement bid boards with direct agency relationships and manual portal checks.
A bid board's value is breadth: it surfaces that a project exists. It generally does not tell a contractor whether the project is worth pursuing. Scope fit, geography, bonding, and competition still have to be checked after the lead is found. Nonlinear takes the projects a bid board (or any other discovery source) surfaces and reads the documents to determine relevance, scope, and risk.

