What will the code open?
Choose the content before saving. A URL opens a page; Wi-Fi stores the network name, security type and password; email opens a draft. The preview summary shows what is inside. For a stock ID or assigned retail number instead, make a barcode.
A worked example
The address https://tooloctopus.com is encoded as written. A missing https:// prefix may be treated as plain text by a scanner.
Before you use the result
Keep the white border. More error correction makes a denser code, so leave enough room in print. The destination is fixed in the image; changing the destination requires a new code.