Prompt: Latest technology news summary

In technology news, Facebook announces a new feature for its site that will let users see what friends have been posting about them as well as posts by people they follow. The feature is called “Reactions.” Twitter announces that it has acquired the app Amplitude, which will be used to help the company focus on “promote healthy conversations.” Apple announces that it has created a new operating system, tvOS, which will be used to power the next-generation Apple TV.