Sharing sets allow you to grant access to records that have a lookup relationship to the same account or contact that the community user has. You can use sharing sets to share opportunities with partner community users who belong to the same account as the opportunity owner.
Criteria-based sharing rules allow you to share records based on field values. You can use criteria-based sharing rules to share opportunities with partner community users who meet certain criteria, such as region, industry, or status.

To enable the guest user to run the flow, UC should set the "Enable Lightning Flows for Guest User" toggle option to ON in Setup. A flow is a tool that allows you to automate business processes by guiding users through screens andperforming actions based on their inputs. A guest user is a user whoaccesses your Experience Cloud site without logging in or registering. To allow guest users to run flows on your site, you need to enable the "Enable Lightning Flows for Guest User" option in Setup, which gives guest users access to run flows that are embedded in Lightning pages or Visualforce pages.

To create a do-it-yourself site for its existing and prospective customers, UC should focus on two Experience Cloud features:
Guest user and public access settings. These settings allow you to control what unauthenticated users can see and do on your site, such as viewing articles, manuals, and FAQs, or asking and answering questions.
Content Delivery Network. This is a feature that allows you to improve the performance of your site by caching static resources, such as images, JavaScript, and CSS files. This can enhance the user experience and reduce the load on your server.

The sharing setting that would allow users to collaborate with their peers who work for the same partner firm, but not with any users outside of their firm, is Portal User Visibility. Portal User Visibility is a setting that allows portal users (such as Customer Community or Partner Community users) to see other portal users who have the same role or a role below them in the portal role hierarchy. This setting enables portal users to share information and collaborate with their peers within their own firm, but not with other firms.

To create a partner user from an enabled partner account, the correct sequence of steps is C. A partner user is a user who has access to your Experience Cloud site through a partner account. A partner account is an account that has the Is Partner checkbox enabled. To enable a partner user, you need to view the partner account contact, select Manage External User, select Enable Partner User, edit the user record to assign the correct role and profile, and save.