SAM.gov says Contract Opportunities include pre-solicitation notices, solicitation notices, award notices, and sole-source notices. Those labels are not interchangeable. A listing is not an award, and an award listing is not a new request for offers.
A pre-solicitation notice is usually an early synopsis that a buy is coming. FAR 5.203 generally requires that notice to appear at least 15 days before the agency issues a solicitation, or before a proposed action the Government intends to solicit and negotiate with only one source, with commercial and other exceptions. Seeing a pre-solicitation notice does not mean you already have a request for quotations in hand.
A solicitation notice is the posting that points to a request for offers or quotations. FAR 2.101 defines a solicitation as any request to submit offers or quotations to the Government. That is typically the package you later store in an AsherGate draft, together with every attachment and amendment named on the listing.
An award notice reports a contract that already exists. It can help you learn who won and what was bought. It is not a request for you to submit a bid on that same action. A sole-source notice flags an action the agency does not intend to compete on a full and open basis. FAR 6.302-1 is one authority: when supplies or services are available from only one responsible source, or for DoD, NASA, and the Coast Guard from only one or a limited number of responsible sources, and no other type of supplies or services will satisfy the requirement, full and open competition need not be provided. Other authorities exist. Read the notice and any justification. Do not treat a sole-source listing as an open RFQ.