Peoples on Reddit have said that the Brief Mode has received on some of the Echo devices while some other peoples say that the feature disappeared after some hours. A user asked Alexa to turn their lights on and was greeted with the voice-activated assistant stating that this would be the last time it would verbally confirm the command. Some Echo users won't enable Brief Mode because they like hearing Alexa confirm their exact question or task before it is done.
This seems to be the only difference with brief mode - using beeps instead of verbal cues to acknowledge successful commands - but it's not hard to imagine how Amazon might expand its applications.
If you are one of the Amazon Echo users who received this new feature, share your experience with us. Instead, it'd beep upon a task's completion from that point forward, noting that this was a new feature called "Brief Mode" that'd curtail its speech. All you need to do is say "Alexa.", and complete your inquiry or task. While total silence would be a little more preferable in most scenarios, a beep tone is undoubtedly better than a shrill and loud "OK!" Users must update to the latest version of the app and navigate to Settings General Alexa Voice Responses and toggle Brief Mode on or off.
Once again, Amazon hasn't made any announcement about the feature, so your mileage may vary when trying to turn it on or off on your Echo equipment.
If you're like me and use your smart speaker to control a number of different Wi-Fi enabled devices, including smart lightbulbs, Brief Mode is likely a feature you've been waiting for.