The latest update to the Smartsheet application, code-named Lightbulb, focused on some incremental changes to the Smartsheet UI. One of those changes involved displaying the profile picture of each user currently looking at a sheet or report.
Now when looking at a sheet or report you'll see the profile pictures of all the other users who are also looking at that sheet or report.
This particular feature was started by a contractor who was working on several UI features, but finished off in-house by Erik Chou, Software Development Engineer II. When the code was turned in by the contractor, it still needed some work before the feature could be used in production. That clean up task was given to Erik.