For some connectors like JIRA and GitHub you can choose to filter issues to be synced depending on their type.
For GitHub, you can choose to sync only Issues, PRs, or both.
For JIRA you can choose to sync all issue types or select from among these: Bug, Epic, Improvement, New Feature, Task.
To filter issues by their type, go to your sync settings under "Filter Tasks" tab. If you don't add an issue type filter at all, all issues will be synced, whereas if you select one or several issue types, only the issues with this type will be synced. In this picture, for example, only "Tasks" from JIRA will be synced over to Wrike here!