The solution module in the portal helps the portal users to get a probable solution before generating any case.
When the portal user faces any queries or issues, they will navigate to add a case option.
They can add queries or issues in search solution boxes if they want to or they can also directly add a case. If they have searched and there is any appropriate solution related to that query, then the solution will get listed.
The users will also get a counter of likes or dislikes of the solutions. Moreover, a user also likes or dislikes them if the solution is to find them useful.
If no solution is found related to portal users queries or issues or they didn’t find which they are looking for then they can add case by clicking on the “Add Case” button.
Once the case is added and if admin adds any solution related to that case then the portal user can view those solutions. Navigate to Case Listing -> Actions -> Solutions.
Note: Here default solution object of salesforce is being used. For adding a solution and relating it to any case you need to navigate to Classic View -> All Tabs -> solution.