コミュニティとは、現在 Experience Cloud サイトとして知られているものの古い用語です。新しい用語は、作成できるさまざまな種類のデジタル エクスペリエンスをよりよく反映しています。ソース ( https://resources.docs.salesforce.com/242/latest/en-us/sfdc/pdf/communities.pdf )
Communities
- Communities are a great way to share information and collaborate with people outside your company who are key to your business processes, such as customers, partners, or employees.
- It is a social stage of the Salesforce.com that is intended to associate and encourage correspondence among an association’s representatives, accomplices and clients
- Sub-domain sites built with Community Builder (Lightning), standard Salesforce UI (Tabs), or custom Visualforce.
https://help.salesforce.com/articleView?id=networks_resources.htm&type=5
Sites
- Salesforce Sites enables you to create public websites and applications that are directly integrated with your Salesforce organization—without requiring users to log in with a username and password.
- Sites in Salesforce empowers you to make open sites and applications that are straightforwardly coordinated with your Salesforce association—without expecting clients to sign in with a username and secret key. You can freely uncover any data which has been put away in your association through a marked URL of your choice.
- Force.com Sites - Sub-domain sites that have no authentication built with Visualforce. (Authenticated VF communities are built in much the same way, but are technically distinct because of authentication).
https://help.salesforce.com/articleView?id=sites_overview.htm&type=5