24 7 means continuous
With 24/7 (or 247, or the English name twenty four Seven) it is meant that something is continuously present. It is often a question of business services (think of a call centre) where there is always a service available, whether it is weekend or during the day, to reach the call centre. With the advent of the Internet, we have become increasingly accustomed to the fact that something is always available, but that is not normal, which requires many Parties to participate. Often, 24×7 is also used as a marketing tool to indicate that something is very reliable.