Google Sites is a structured wiki- and Web page-creation tool offered by Google as part of the G Suite productivity suite. The goal of Google Sites is for anyone to be able to create a team-oriented site where multiple people can collaborate and share files.
Google Sites
Sites Help – Information on creating, editing, previewing, sharing, publishing, and managing your Google site.
20/20 HindSITE: Best Practices for Google Sites – This site illustrates how organizations are using Google Sites, and includes a wealth of resources and tools.