The Log Shipping - Secondary Job alarm is raised when a secondary copy or restore job is not enabled.
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This alarm alerts you to jobs that are inadvertently or otherwise disabled.

See also the SQL Server | High Availability drilldown | Secondaries page | Transaction Log Shipping Secondaries grid.

You can configure this alarm to ignore certain values. You can configure different alarm severities for specific primary databases. From the Spotlight Client see Configure | Alarms.