Schema.org - Aprenda o que é se quiser seu site no Google

schema_org.html

<div itemscope itemtype="http://schema.org/Product">

  <a itemprop="url" href="url-do-produto">
    <div itemprop="name">
      <strong>Nome do Produto</strong>
    </div>
  </a>

  <div itemprop="description">Descricao do Produto</div>

  <div itemprop="brand" itemscope itemtype="http://schema.org/Organization">
    <span itemprop="name">Marca</span>
  </div>

  <div itemprop="manufacturer" itemscope itemtype="http://schema.org/Organization">
    Fabricado por: <span itemprop="name">Fabricante</span>
  </div>

  <div>Modelo: <span itemprop="model">Modelo</span></div>
  <div>ID: <span itemprop="productID">SKU</span></div>

  <div itemprop="aggregateRating" itemscope itemtype="http://schema.org/AggregateRating">
    <span itemprop="ratingValue">4</span> based on <span itemprop="reviewCount">5</span> reviews
  </div>

  <div itemprop="offers" itemscope itemtype="http://schema.org/Offer">
    <span itemprop="price">45,50</span>
    <link itemprop="itemCondition" href="http://schema.org/NewCondition" /> New
  </div>

</div>