Actually the QR codes are on all of the charts, not just the sectionals.
The QR code is an easy, quick book mark for looking up updated changes since you bought your chart and more very good pre-flight items. Below the video see the web page the QR code will take you.
------------------------------------------------------------------------------------------------------------
VFR Charting
NOTAMs - are notices filed with an aviation autority to alert pilots of potential hazards along a route of flight or at a location that could affect the safety of the flight.
Temporary Flight Restrictions (TFRs) - are issued by the NOTAM System to restrict certain aircraft from operating within a defined area on a temporary basis to protect persons or property in the air or on the ground.
Safety Alerts and Charting Notices - are notices regarding charting products currently in effect that may not be NOTAM worthy.
VFR Chart Update Bulletins - provides major changes in aeronautical information that have occurred since the last publication date of each Sectional, TAC, and Helicopter Route Chart listed.
VFR Class B Enhancement Graphics - provides graphics designed to increase safety and aid pilots in gaining situational awareness within existing and redesigned Class B areas.
A/FDs, Alaska & Pacific Supplements - provides airport, communication and NAVAID information.
Alaska Wx Cameras - Servicing 190 Alaska locations on a near real-time basis.
Aeronautical Chart User's Guide - contains a listing of charting symbols used on each AeroNav product and its meaning.
Frequently Asked (Visual) Questions - contains a listing of frequently asked questions and answers.