iPen, or In-Person Electronic Notarization, allows the signer and Notary to meet in person while completing the document and notarization electronically rather than on paper.
Depending on the document and receiving party, potential benefits may include:
iPen can be useful when an electronic document is preferred but the signer and Notary are able or required to meet in person.
However, not every document or receiving party accepts electronic signatures or electronic notarization. Before choosing iPen, confirm that the receiving party will accept an electronically signed and notarized document.
Most importantly, I would add a short distinction at the bottom:
iPen vs. RON: With iPen, the signer and Notary are physically together. With Remote Online Notarization (RON), the signer and Notary communicate remotely through live audio-video technology.