It allows us to express an algorithm.
A programming language is a vocabulary and set of grammatical rules for instructing a computer or computing device to perform specific tasks. The term programming language usually refers to high-level languages, Example: C, C++, JAVA, PYTHON. C#.etc.
The programming language is the language that can understand computers or machines. But high-level language syntax man can read that easily. Pseudocode is not an actual programming language. The computer programming language, any of various languages for expressing a set of detailed instructions for a computer.