Hi AutoCultivo,
The breadcrumbs are encoded in JSON format, which, when Google sees them, will converted back to a human-readable URL. So Google perfectly understands them.
Matt Cutts explains here on YouTube that breadcrumbs, and even multiple breadcrumbs, help Google better understand your website’s structure.
On this documentation page you can see its effects in the Search Engine Results Pages, which is quite a great addition in my opinion :).
In 2.6.0, I made it optional to deactivate them.
But they won’t do any harm, in fact, they might even help.
I hope this clears things up! Let me know if you have any more questions :).
