A raised hand, which is shown in reverse position (back of the hand is in the front). Someone wants to draw attention to himself, e.g. to ask something or to signalize his participation.
The raised back of hand emoji was introduced in 2016 and released as part of the Unicode 11.0 standard. This emoji can be found under the people and body
category. Because the raised back of hand emoji has been around for quite some time, it should display correctly in the majority of operating systems.