5 Examples of Google Fonts for Headings
Roboto font itself is a versatile font. But for headings, Roboto Slab is more suitable. It is tight and very well balanced. This one is an excellent choice for business or tech oriented websites.
This sans-serif font has a width to height ratio that is almost equal, which makes it very profound. It has a large variety of styles, so you can use different variations to increase rendering speed. This font (especially when used in bold weights) looks good for corporate or portfolio sites.
These are certainly not all of the fonts that can be used for headings, but gives you a solid starting point for creating your own headings.