Definition
Push rides on installed-app permission, delivering instant reach at negligible cost. Permission decay is the enemy - irrelevant pings train users to disable notifications permanently within weeks.
Why it matters
For apps and repeat-purchase businesses, well-sequenced push recovers carts and drives session returns at margins email cannot match.
Benchmarks
Opt-in above 40% Android, ~25% iOS; watch disable rates monthly
All glossary terms