Meaning
A prioritized accumulation of uncompleted work, features, or bug fixes waiting to be tackled.
Three examples from work
Grooming
POLet's groom the product backlog before sprint planning.
DevI'll review the technical debt tickets in the backlog first.
Prioritization
DesignerWhere does the new navigation flow sit in the backlog?
PMIt's near the top of the Q3 backlog.
Client sync
ClientIs our custom report feature in progress?
Account LeadIt is currently sitting in the backlog, scheduled for next month.
Common collocations include 'groom the backlog', 'refine the backlog', and 'clear the backlog'. It can refer to product features or customer support tickets.