grid-row and grid-column properties are shorthand properties for specifying a grid item’s size and location within a grid by specifying the inline-start and inline-end edge of its grid area.

Example

<div id="grid">
  <span>1</span>
  <span>2</span>
  <span>3</span>
  <span>4</span>
  <span>5</span>
  <span>6</span>
  <span>7</span>
  <span>8</span>
  <span>9</span>
  <span>10</span>
  <span>11</span>
  <span>12</span>
  <span>13</span>
  <span>14</span>
  <span>15</span>
</div>
#grid {
  display: grid;
  grid-template-columns: repeat(4, 50px);
}

#grid span {
  border: 1px solid black;
  padding: 5px;
  text-align: center;
}

#grid span:nth-of-type(3) {
  grid-column: 2 / 4;
  grid-row: 2 / 5;
  background: pink;
}

Result

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15