<caption> : l'élément de légende d'un tableau

<table>
  <caption>
    He-Man and Skeletor facts
  </caption>
  <tr>
    <td></td>
    <th scope="col" class="heman">He-Man</th>
    <th scope="col" class="skeletor">Skeletor</th>
  </tr>
  <tr>
    <th scope="row">Role</th>
    <td>Hero</td>
    <td>Villain</td>
  </tr>
  <tr>
    <th scope="row">Weapon</th>
    <td>Power Sword</td>
    <td>Havoc Staff</td>
  </tr>
  <tr>
    <th scope="row">Dark secret</th>
    <td>Expert florist</td>
    <td>Cries at romcoms</td>
  </tr>
</table>

caption {
  caption-side: bottom;
  padding: 10px;
  font-weight: bold;
}

table {
  border-collapse: collapse;
  border: 2px solid rgb(140 140 140);
  font-family: sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

th,
td {
  border: 1px solid rgb(160 160 160);
  padding: 8px 10px;
}

th {
  background-color: rgb(230 230 230);
}

td {
  text-align: center;
}

tr:nth-child(even) td {
  background-color: rgb(250 250 250);
}

tr:nth-child(odd) td {
  background-color: rgb(240 240 240);
}

.heman {
  font: 1.4rem molot;
  text-shadow:
    1px 1px 1px #fff,
    2px 2px 1px #000;
}

.skeletor {
  font: 1.7rem rapscallion;
  letter-spacing: 3px;
  text-shadow:
    1px 1px 0 #fff,
    0 0 9px #000;
}

<table>
  <caption>
    Légende de l'exemple
  </caption>
  <tr>
    <th>Connexion</th>
    <th>Courriel :</th>
  </tr>
  <tr>
    <td>utilisateur1</td>
    <td>utilisateur1@test.fr</td>
  </tr>
  <tr>
    <td>utilisateur2</td>
    <td>utilisateur2@test.fr</td>
  </tr>
</table>

caption {
  caption-side: top;
}
table {
  border-collapse: collapse;
  border-spacing: 0px;
}
table,
th,
td {
  border: 1px solid black;
}