It would be great to have a section ion the page or in the forum to share code snippets without making a package out of it. For example, I wrote this yesterday, it is very simple - however maybe someone else could use it as well.

@inherits Umbraco.Web.Macros.PartialViewMacroPage
@*
    This snippet makes a breadcrumb of parents using an html ordered list.
    It makes metadata available for search engines in the Microdata format.
    The CSS is customised for Bootstrap 4
*@

@if (CurrentPage.Ancestors().Any())
{
    dynamic pageAncestors = CurrentPage.AncestorsOrSelf().OrderBy("Level");
    string cssClass = "breadcrumb-item";
<div>
    <ol class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList">

        @foreach (var page in pageAncestors)
        {
            if (page.level == pageAncestors.Count()) { cssClass = "breadcrumb-item active"; }
                <li class="@cssClass" itemprop="itemListElement" itemscope
                    itemtype="http://schema.org/ListItem">
                    <a itemscope itemtype="http://schema.org/Thing"
                       itemprop="item" href="@page.Url">
                        <span itemprop="name">@page.Name</span>
                    </a>
                    <meta itemprop="position" content="@page.Level" />
                </li>
        }
    </ol>
</div>
}