now available to you in the Android and iOS versions of Slides, Docs, and Sheets. Tap the red "+" button to create a new Slideshow, Document, or Sheet and you'll be presented with the option to create from a template or create from scratch.
As someone who gets frustrated by manipulating spreadsheets, I find the Sheets templates to be particularly useful. The Docs and Slides templates are also helpful when I need inspiration for layouts and color schemes. One of the Slides templates that I frequently use is the student certificate template.