Worklog synchronization can be useful to track progress of tickets or overall project progress.
If receiving worklog is disabled in configuration then you will get follwoing status:
That is how it looks in remote Jira
In this section you can select if you want to synchronize worklogs:
Expose Time Spent | If a user will log work on issue, then it can be send to remote JIRA |
Receive Time Spent | If a worklog is received from remote issue, work can be logged to the issue |