SOP (Same-Origin Policy)

The Same-Origin Policy (SOP) is a security rule in web browsers that prevents different websites from accessing each other's data. It ensures that scripts or code from one website cannot read or manipulate content from another website unless they share the same origin (domain, protocol, and port). This protects user information and maintains security online, preventing malicious sites from stealing data or causing harm. SOP helps keep browsing safe by restricting how websites interact with one another, allowing legitimate interactions only when they are from the same source.