A computer program is a set of instructions that is used to instruct a computer to perform a specific task. When we say computer programs don't complicate things, it simply means applications we use in our day-to-day life.
When we run a computer program, the computer reads and follows a set of instructions that is set by a computer program step by step. For example, when we open a clock app from our device, it displays current time on a screen. So it means it was programmed to show the current time.
And also some computer programs takes an input from us and processes it and give us a desired output. Like a calculator, we input the numbers we would like to operate it.
So it means a computer program is something that help us to make life easier because they are used to task automation, Data processing and providing functionality.
Computer programs are written by a programming language, (when I say written it means coded) which computer understand. We will make our own programs using C++ later on this series.