The daily chart is a nickname giving to a price chart with a one day time frame for each candle. It is one of the most commonly used and referenced charts in the investing world.

INSERT IMAGE OF DAILY CHART

The end of a day on the crypto charts corresponds to midnight in GMT. This is because the crypto market operates 24 hours per day, unlike the stock markets which operate at fixed hours (for example 930AM to 4PM EST). The standard of GMT was chosen as that is the same as the forex (global currencies) market

It's predominately used by swing traders who hold trades over several days to weeks, or position traders. It is not often used by scalpers or day traders as it's on too long of a time scale.