Letters are symbols used in writing to represent sounds and form words. They are the building blocks of language, allowing us to communicate our thoughts and ideas. Each letter has its own unique shape and sound, and when combined, they create the words we use every day. For example, the letter A can be found in many words like apple and ant. In the English alphabet, there are 26 letters, ranging from A to Z. Each letter can be written in uppercase or lowercase, which helps convey different meanings or emphasizes certain words. Learning letters is the first step in reading and writing, making them essential for education and communication.