Droid Serif is a serif font. It goes well with Roboto, Raleway, TeX Gyre Adventor, Lato, T Star, Neue Hans Kendrik, Poppins, Droid Sans, Essays and Bebas Neue. If you're thinking about using Droid Serif then try Give 16px a shot for content.
People commonly tag it as social, app, guide, ebook, news, agency, simple, food, design and portfolio. You can get it from Font Squirrel, Fonts.com, Fontshop, Google Web Fonts, MyFonts, Typekit and Webtype.