Conference report vs. ping-pong — two paths to a final bill
Conference committees are slow. Modern Congress increasingly uses 'ping-pong' instead: one chamber amends the other's version and sends it back, repeated until both chambers pass identical text. No conference committee, no conference report, just amendment exchange. The final-passage vote on the amended-back-version is functionally equivalent to a conference report vote.
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Conference path — formal
Conference committee meets, reconciles, produces conference report. Both chambers vote on the report.
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Ping-pong path — informal
Chamber A passes a version. Chamber B amends it and passes the amended version. Chamber A then either accepts or further amends. Repeat until identical text passes both.
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Why ping-pong dominates now
It's faster and avoids the conference committee's structural overhead. Most major legislation since the 2000s reaches the President via ping-pong, not conference report.
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How to read these votes
Look for "Concurrent in House Amendment" or "Senate amendment to House amendment" in the question text. These are the ping-pong final-passage votes.