Signal Requests are the shortest and most powerful of the MakerDAO governance processes. A signal request can be created by any member of the community. Signals are primarily used to change existing parameters within the MakerDAO smart contract system.
The signaling process can also be used to gather consensus on governance direction when that direction does not require work to implement, for example signaling on how domain teams should prioritise collateral assets.
Votes in the signalling process are first taken off-chain on the forums, if the off-chain vote is successful, on-chain polls are also conducted using the weekly cycle. If the on-chain poll ends with a majority for change, the change will be included in the weekly executive vote.
A practical guide to using the signaling process can be found here .