Front-end development is all about crafting the user experience (UX) by building the interactive elements and visual components of a website or application. This is what users see and directly interact with.
Back-end development focuses on the server-side logic that powers a website or application. It's the unseen engine that handles data storage, processing, and communication between the database and the user interface.
APIs (Application Programming Interfaces) are essentially the way different software components communicate with each other. Microservices architectures break down large applications into smaller, independent services that communicate through APIs.