The SRE team has asked that Service Level Objectives (SLOs) and related Service Level Indicators (SLIs) be defined for all services running in Wikimedia production. This task is to define those for the push-notifications service (here).

For inspiration, see the SLIs/SLOs for Wikifeeds: https://wikitech.wikimedia.org/wiki/Wikifeeds#Service_level_indicators/objectives_(SLIs/SLOs)[1]

For further background on this topic: https://landing.google.com/sre/sre-book/chapters/service-level-objectives/