# Using Data from Revit
Using Generative Design in Revit can be a very powerful approach to quickly explore multiple design options. To ensure your studies are being executed efficiently, make sure to use the Remember and Gate nodes appropriately. This will enable to control data that is imported from Revit and data that is used by the generative design workflow. It is important to place these nodes because generative design requires multiple iterations and making each iteration dependent on Revit may require heavy computation time.
As seen below the Remember nodes and the Gate nodes will limit performing heavy computation tasks by only taking simple data inputs, as described in the [Data.Remember Node Inputs section](/03-hello-gd-for-revit/03-07_using-revit-alongside-gd-for-revit/03-07-02_data-remember-node-inputs.md), to perform generative design studies.
## Remember Node
The Remember node is used to store information from Revit, allowing you to use certain parameters from Revit elements in a generative design workflow.
## Gate Node
The Gate node controls the flow from the generative design workflow to Revit, allowing you to create or modify Revit elements once, when you select **Create Revit Elements** inside generative design.
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