If you have a set of completed forms and need to compile the data, you can use Acrobat DC to merge the responses into a single spreadsheet.
Start by putting all your PDF files into a folder on your computer.
Open one for the form files in Acrobat DC and select Prepare Form from the Tools center or pane.
In the right pane, select More, Merge Data Files into Spreadsheet.
Select the folder you created with the form responses and Acrobat will extract the data from each and create a spreadsheet of all the data.
Click to download a PDF of the Working with form data tutorial.