Get Records in Flow Builder
Key Takeaway
A flow has no built-in knowledge of your org's records, so Get Records is how you pull data in, and it only reads that data.
Get Records is the Flow Builder element that reads Salesforce data into a flow. It finds the standard or custom object records that match your filter and sort conditions, then stores their values in variables that later elements can use.
What Get Records does
To use Get Records, you pick a standard or custom object, add filter conditions to choose which records you want, and optionally set a sort order.
Get Records only reads data. Any changes the flow makes to the stored values are temporary and stay inside the flow until a Create Records, Update Records, or Delete Records element sends them back to the org.
For example, imagine a flow that uses Get Records to read a contact, then changes that contact's phone number value. The contact in your org keeps its old phone number until an Update Records element sends the change back.