Base-64 Encoding is a method used to convert binary data into a text format. This is done by dividing the data into groups of 6 bits and then mapping each group to a specific character from a set of 64 characters, which includes uppercase and lowercase letters, digits, and special symbols. This encoding is useful for transmitting data over media that are designed to handle text. The primary purpose of Base-64 Encoding is to ensure that binary data remains intact without modification during transport. It is commonly used in email attachments, data URLs, and JSON data, allowing systems that only support text to handle binary information effectively.