section-home-hero.liquid

{% comment %}SECTION{% endcomment %}

{%
  include 'hero'
    hero_title: section.settings.title
%}

{% schema %}
  {
    "name": "Product hero",
    "settings": [
      {
        "type":       "text",
        "id":         "title",
        "label":      "Hero title"
      }
    ]
  }
{% endschema %}

snippet-hero.liquid

{% assign hero_title = hero_title | default: 'Some title' %}

<div class="hero">
  <div class="hero__item">
    <h2 class="hero__item__title">{{ hero__title }}
  </div>
</div><!--/hero-->

{% assign hero_title = blank %}