Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical supports and security updates. Internet Explorer 11 is the last version of Internet Explorer, and will continue to receive security updates, compatibility fixes, and technical support on Windows 7, Windows 8.1, and Windows 10. If you are running older versions of IE Microsoft will no longer provide security updates or technical support. On current versions of their software Microsoft updates patch vulnerabilities that may be exploited by malware, helping to keep users and their data safer.
Although I never recommend that you are an early adopter, staying current is important. IE11 had been out since late in 2013, so if you’re not running it you are really behind.
Internet Explorer 11 offers improved security, increased performance, better backward compatibility, and support for the web standards that power today’s websites and services. Microsoft encourages customers to upgrade and stay up-to-date on the latest browser for a faster, more secure browsing experience.