Answers for "show div on hover on the div"

on hover display another div css

.showme {
  display: none;
}

.showhim:hover .showme {
  display: block;
}


<div class="showhim">HOVER ME
  <div class="showme">hai</div>
</div>

how to hover div in css

<div class="casual-div"></div>

.casual-div:hover {
  background-color: red;
}