As Museo Slab’s name suggests, this is a slab serif typeface, but don’t let that fool you into thinking Museo Slab is purely a display font. Museo Slab is legible at tiny sizes, and includes ...

Not only was Ron able to deduce the name of the font, but it turns out that Google actually shipped four fonts with keep, all under the moniker Roboto Slab (thin, light, regular, and bold).