FedBizOpps was the place where all the federal government’s contracts valued at more than $25,000 were announced. You could find it here – https://www.fbo.gov/ before it transitioned into beta.sam.gov in November 2019.
Factsheet about the FBO.gov transition, November 2019: https://www.gsa.gov/cdnstatic/FBO_Is_Transitioning_to_Beta_Factsheet_%281%29.pdf
Helpful Hints for tracking contract opportunities can be found here now that “watch lists” from FBO are gone: https://interact.gsa.gov/blog/helpful-hints-new-contract-opportunities-function-betasamgov-how-track-opportunities
Quick start guide for contractors: http://falextracts.s3.amazonaws.com/Documentation/Federal%20Hierarchy/QSG%20Opportunities%20Part%204%20of%204%20-%20Contractors.pdf
Current status of the consolidation: https://beta.sam.gov/help/whats-next