Same-Origin Policy

The Same-Origin Policy is a security measure used by web browsers to prevent one website from accessing data from another website unless they originate from the same source. This means that scripts on a webpage can only interact with content from the same website (same domain, protocol, and port). This policy helps protect users' information and privacy, preventing malicious sites from stealing data or executing unauthorized actions on other sites where a user might be logged in. Essentially, it keeps interactions between different sites controlled and secure.