Transaction Landing

The outcome of a transaction being successfully included and confirmed in a Solana block, as opposed to being dropped, expiring, or failing simulation. Landing probability is influenced by priority fee competitiveness, blockhash freshness (must be within ~150 slots of creation), submission routing (direct to leader vs. RPC rebroadcast), and network congestion on the accounts involved. Developers optimize landing rates by using current-leader TPU endpoints, setting appropriate priority fees, and preflight-checking transactions before submission.