JSFiddle - React, Tailwind, and code Playground

HTML

<div class="contentDiv">
  <p>
    <span class="tooltip">Hover 1
      <span class="tooltiptext">Tooltip text for Hover #1.</span>
    </span>
  </p>
  <p>
    <span class="tooltip">Hover 2
      <span class="tooltiptext">Tooltip text for Hover #2.</span>
    </span>
  </p>
</div>
<div style="clear:both;"></div>
<br>
<div class="contentDiv twoColumn">
  <p>
    <span class="tooltip">Hover 3
      <span class="tooltiptext">Tooltip text for Hover #3.</span>
    </span>
  </p>
  <p>
    <span class="tooltip">Hover 4
      <span class="tooltiptext">Tooltip text for Hover #4.</span>
    </span>
  </p>
</div>

CSS

/* Tooltip container */
.tooltip {
  position: relative;
  display: inline-block;
}

/* Tooltip text */
.tooltip .tooltiptext {
  visibility: hidden;
  width: 150px;
  background-color: black;
  color: #fff;
  text-align: center;
  padding: 5px;
  border-radius: 6px;

  /* Position the tooltip text */
  position: absolute;
  z-index: 1;
  top: 160%;
  left: 50%;
  margin-left: -75px;
  /* Use half of the width (150/2 = 75), to center the tooltip */
}

.tooltip .tooltiptext::after {
  /* Add an arrow */
  content: " ";
  position: absolute;
  bottom: 100%;
  /* At the top of the tooltip */
  left: 50%;
  margin-left: -10px;
  border-width: 10px;
  border-style: solid;
  border-color: transparent transparent black transparent;
}

/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
  visibility: visible;
}

.contentDiv {
  margin-left: 50px;
  padding: 5px;
  width: 100px;
  border: 1px solid black;
}

.contentDiv p {
  margin: 0;
}

.contentDiv.twoColumn {
  width: 210px;
  column-count: 2;
  -moz-column-count: 2;
  -webkit-column-count: 2;
  column-rule: 1px solid black;
  -moz-column-rule: 1px solid black;
  -webkit-column-rule: 1px solid black;
}