Breadcrumbs are used to note the path of a record and help the user to navigate back to the parent.
Breadcrumbs help users become aware of their current location with respect to the rest of the website or application. By using the page hierarchy, breadcrumbs are easily understood by users, take up very little space on the page, and facilitate discovery. As helpful as they are, breadcrumbs should never replace the main navigation on a page.
Breadcrumbs show the hierarchical progress from the highest entity level to the lowest, one step at a time. This typically starts with the product landing page and goes to the current page or content.
The default variants come for use up to 4 levels of hierarchy. There is always a trailing slash.
If it ever comes down to using breadcrumbs for more than 4 levels, use the component More than 4 levels. It has a tiny transparent icon button in the middle to show the truncation. Users can click on this button to get a menu that will display the truncated levels.