When SharePoint 2013 got released there was something missing in the UI. There was no breadcrumb control anymore like in SharePoint 2010. A couple of clients and users were struggling finding their way on the site. In March 2013, I created a script that allowed you to transform the SharePoint text in the suite bar (on the left side) into a breadcrumb.
Where is the breadcrumb in SharePoint 2013? There isn’t one out-of-the-box, but this post helps you to get one back. The out-of-the-box Seattle or Oslo master pages don’t have a breadcrumb located in their HTML markup. That makes navigating from sub-sites to their parent site difficult, if you have not set a good global navigation structure.