This measures how quickly your connection pulls data from the internet to your device . It is the "big number" usually advertised by Internet Service Providers (ISPs) .
This measures how quickly your device can send data from your home to the internet . While often lower than download speed, it is vital for any activity where others need to see or receive your data. How a Speed Test Works speed test meaning of download and upload
ELI5: How do internet speed tests work? : r/explainlikeimfive This measures how quickly your connection pulls data
Both metrics are typically measured in , which represents the rate at which data can be transferred over your connection. speed test meaning of download and upload