Engineer from Pixie here. Pixie is an APM tool for Kubernetes leveraging eBPF for automatic data collection. You can use it to monitor and debug your application performance, without code or configuration changes.
/s noted (but point also taken). For those unfamiliar: APM = application performance monitoring. Essentially, figuring out why your application is slow or broken.
In general, academic rule applies: Never write an article without defining terms beforehand.