Google Drive - Scan a Document in the Google Drive app

Use the Google Drive app to create an electronic version of a physical document.

Open Google Drive app on your mobile device.
Click the Google-colored Plus (+) icon at the bottom to open the upload menu.
Tap the Scan document option in this menu.
Place camera over the item you want to scan, then tap the white capture button.
You can adjust the border of your document. Tap Keep Scan when ready, or take a new photo.
You'll return to the camera, where you can either add more pages, or tap Save to proceed with the upload.
Before uploading, you'll be able to finalize details such as the filename and save location. Tap Upload button to complete the upload.