The interactive text fields are common on job applications, official forms, contracts and any other document where the creator controls the fields and the user can only input data into the fields ...

Click anywhere on the Word document. On the menu bar, click the Insert tab. In the Text group, click the Quick Parts button. Then select Field from the drop-down menu. A Field dialog box will appear.

PDF is used by everyone nowadays because of its convenience to open, create, read, review, and print documents regardless of the hardware device or operating system or software program you are using.