Symfony 4. Use services to write logic? What are these services? And where can you read about them?

Question

symfony

Hello everyone, they sent a test task, everything seems to be clear what needs to be done, but one thing is not clear
The phrase "Use services to write logic." What are the services? I just met Symfony yesterday.

Answer 1

Services are not specifically related to symphony, they are a good practice for implementing business logic (receiving data) or service tasks (some kind of parsing, caching, etc.).