camelCase is a popular way of writing phrases without spaces, where the first letter of each word is capitalized except for the very first word. For example, instead of writing "my variable name," you would write it as "myVariableName." This style is commonly used in programming languages like Java and JavaScript to create variable names and function names that are easy to read. Using camelCase helps improve code readability and organization, making it easier for developers to understand the purpose of a variable at a glance. It’s a simple yet effective convention that many programmers adopt to maintain consistency in their code.