A Quick Response (QR) Code is a square barcode invented in the early 90s as a way of transferring much more information than a traditional barcode. You scan it with your smartphone, which then opens up a browser tab where the information inside that QR code can be accessed.
A qualified lead is a customer that qualifies as a good potential fit for your product or service. For example, someone who’s car insurance is up in a month would be a qualified lead, but someone who has recently renewed would not be, and therefore not worth pursuing at this moment in time. Qualifying leads are much more likely to convert.
A metric used by Google to determine the quality and relevancy of a keyword based on the ads and landing page associated with it. The higher the relevancy, the higher the quality score and usually the cheaper our CPCs.