The blog post Top Knowledge Articles documents describes the goal of these documents on Communities - to make knowledge frequently used by Customer Support easily accessible to community members.
You can find a list of all such documents by using this query on communities.
Below is a list of these documents grouped by product area, which may make it easier to find ones of interest.
Control-M or Workload Automation
IT Service Management / Remedy, Remedyforce, TrueSight, and Cloud Lifecycle Management Top Viewed