Setting Gated Check-in build option in Visual Studio Online

I have added a Visual Studio project in Visual Studio Online at sitename.visualstudio.com. How do I enable a gated check-in build for all checkins in the Visual Studio Online web access portal? Do we have option to send code for review in Visual Studio Online's web access portal as well? Where can I find that?

What is gated checkin in tfs?

Introduction. A gated check-in is a process that restricts developers from merging a broken code into the source control system—something every software company wants to establish.

Which of the following are check in branch policy is not available for TFVC?

There is no standard check-in policy for TFVC to enforce a get-latest prior to check-in.

To setup Gated Checkin you first need to create a TFS Build, and under the Trigger tab set it to Gated Build.

For Code Review you can create one from the My Work section in Team Explorer (in Visual Studio).