TL;DRA floor the customer pays whether or not their usage reaches it.
A commitment says the customer owes at least a set amount per period across one or more products. If measured usage comes in under the floor, a top-up line brings the invoice to the commitment; if it comes in over, the overage bills normally.
Commitments can span product groups, and late-arriving usage moves the number until the invoice is issued.
Where it happens in Sonic
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See it on your contracts
A walkthrough on the agreements and files you actually bill from — not a slide deck.