Breadcrumbs and Google

Google is integrating breadcrumbs navigation within the SERPs which actually makes your listing look more attractive and trustworthy.

Not in every case the breadcrumb navigation is picked up. The algorithm behind this is certainly a mystery but putting the breadcrumb trail closer to the top of the page source code should help (note: I am not claiming this is the only factor that comes into play but from a few cases I’ve seen, the closeness to the top does seem to make Google recognize the breadcrumbs easier).