Big bang Deployment
Big bang deployment when you deploy by downtime.
Canary Deployment
A canary deployment is a progressive rollout of an application that splits traffic between an already-deployed version and a new version, rolling it out to a subset of users before rolling out fully.
Blue–Green Deployments
In blue–green deployments, two servers are maintained: a “blue” server and a “green” server. The blue version is the live version and green one is the backup one. At any given time, only one server is handling requests (e.g., being pointed to by the DNS).