A service-level agreement (SLA) is a term for the contract agreed between the provider of a service (Google) and its user (the customer). We guarantee every one of our customers the availability of the services.
In our experience, the availability of cloud services is 99.9%. That means the monthly service outage can be 8 minutes at most. Can your IT do that? How big was your last IT problem?
In any case, you can always check the status of the service on the Workspace (G Suite) Status Dashboard here.
You will find a detailed overview of the SLA for Workspace (G Suite) here.
And if you are dealing with any technical problem, our technical support is here for you.