A dict is like a big dictionary where people keep words and their meanings. Instead of words, it has something called keys, and instead of meanings, it has something called values.
For example, if we imagine a dict that stores the names and ages of a bunch of people. The names of the people would be the keys, and the ages would be the values. So if we wanted to find out how old someone named "Sally" is, we would look up the key "Sally" in the dict, and the value we would find would be Sally's age.
In Python programming, a dict is a way to store data in this way. We can create a dict by typing out all the keys and their corresponding values, or we can add keys and values to the dict one by one. Once we have a dict, we can use it to look up values by their keys and make changes to the values stored in the dict.