Droid Serif is a serif font. It goes well with Raleway, T Star, TeX Gyre Adventor, Lato, Libre Baskerville, Essays, Bebas Neue, Montserrat and Droid Sans. If you're thinking about using Droid Serif then try Give 16px a shot for content.
People commonly tag it as app, minimal, photo, event, design, social, food, business, simple and clean. You can get it from Font Squirrel, Fonts.com, Fontshop, Google Web Fonts, MyFonts, Typekit and Webtype.