ul and ol tags when creating a List.
  ul tag is for grouping a collection of items that do not have a numerical ordering, and their order in the list is meaningless.ol tag, the order is meaningful.{% set list_items %}
  {% include '@bolt-elements-list/list-item.twig' with {
    content: placeholder_1,
  } only %}
  {% include '@bolt-elements-list/list-item.twig' with {
    content: placeholder_2,
  } only %}
  {% include '@bolt-elements-list/list-item.twig' with {
    content: placeholder_3,
  } only %}
{% endset %}
{% include '@bolt-elements-list/list.twig' with {
  tag: 'ol',
  content: list_items
} only %}<ol class="e-bolt-list">
  <li class="e-bolt-list__item">First item</li>
  <li class="e-bolt-list__item">Second item</li>
  <li class="e-bolt-list__item">Third item</li>
</ol>