Linear is an issue tracker built around speed and convention. Instead of letting every team invent its own workflow, it ships with a fixed model — issues, cycles, projects and roadmaps — and makes each of those extremely fast to use. Most actions have a keyboard shortcut, and the interface stays responsive even on large workspaces.
It suits teams who want to spend time shipping rather than configuring their tracker. If your process depends on custom fields, elaborate permission schemes or non-engineering workflows, Jira or ClickUp will bend further.