Those little squares carry more than your link. Some help repair missing information.
WHY CARE?This is here to help you understand the idea and use it—not merely finish a page.WHAT NEXT?Read the first section, explain it in your own words, then try the small task below.
OPEN ONLY WHAT YOU NEED.Start with the short answer. Expand each idea for examples, mistakes and the fuller explanation. Slides or video are added when they genuinely make the subject clearer.
01 · THE BIG IDEARead deeper+
IN PLAIN ENGLISH
QR codes include error-correction data. A scanner can use that extra information to reconstruct some damaged data. The code is designed to tolerate imperfect conditions.
02 · EXAMPLERead deeper+
IN PLAIN ENGLISH
Imagine sending a message with extra clues that let the receiver recover a missing part. QR codes use a mathematical method called Reed–Solomon coding, rather than simply printing the whole message twice.