NodeKit SEQ is a decentralized shared sequencer built into a custom L1 blockchain which allows rollups to decentralize their sequencer and increase cross-rollup interoperability. Rollups are traditionally built on top of other blockchains and execution happen off-chain to increase overall performance in addition to transaction throughout.
Currently most rollups are running centralized sequencers. This leads to downtime issues, censorship concerns, and even performance issues in some cases. With NodeKit SEQ rollups can easily submit transactions to a decentralized shared sequencer which makes it easier to launch a rollup that is decentralized from the start and helps users perform cross-rollup transactions.