List should be introduced with the Colon when the list is preceded by?

Question: List should be introduced with the Colon when the list is preceded by?

When we make a list of any type of items, then the colon is given by writing about the subject of that list. So that there is a systematic work and people know that this information is received about this subject or have to bring these things about this subject, like you have to go to the market and buy the following things: (1) Bags. (2) Books. (3) Pen. (4) Scissors etc.