Here are key features and their differences:
What is a modern team site in SharePoint online?
A SharePoint team site is a great place to share content, information, and apps between you and team members. It gives very well designed out of the box home page web part so that easily a user can navigate to their respective area of works from the home page.
Web parts available in the modern team site home page:
- Quick Links
What is a communication site in SharePoint online?
A SharePoint communication site is a great place to share information with others. You can share news, reports, statuses, and other information in a visually compelling format.
Web parts available in the communication site home page:
When should we use a team site or communication site template?
As we know the modern SharePoint online provides only two templates:
- Team Site and
- Communication Site
Then, in which scenarios, we should choose which one? There is no straight answer for this – as both have their own needs and scope in the business. But as a general rule of thumb, we can set the rule as if the audiences of the site are supposed to be more where its contributions are less, then we can go with the communication site.
For example, if we want to market any product for the sales team, we can go with the communication site, in fact, the company’s main web site also we can design using the communication site template. Because in this kind of site, we don’t need a frequent update, once a while, some dedicated people will update the content of the site. The bottom line is we can think communication site as a public-facing site and that is the reason we don’t see quick launch navigation as it needs more content area to display.
On the other hand, the team site is used for the team where a group of people will contribute to the site, but the audiences of the sites are less as compared to communication site – mainly it is used for the internal team of the company where multiple people collaboratively work with each other but exposed only to set of people. Actually, the meaning of collaboration in SharePoint comes to reality through the team site.
- Office 365 group connected is not available in the communication site.
- The quick launch navigation menu is not available in the communication site.
- The communication site is used only to promote your company's work, product to the outside of your company for marketing purposes.
For the details refer to this article.