Most importantly, information regarding the Observation survey.

Beyond that, more than you probably need to know but also everything you could want to know can be found in the attached document! The document gets into the details of creating/updating the survey, Dashboards, web map... and using the Observations toolbox.

Various articles covering other topics:

• Integration of Source Features and EOs (via Field Maps) with the Observations Survey (in Survey123)
• Add data from an external dataset to the Observations (survey) feature layer in AGOL
• What's involved: NatureServe cloning data from NS AGOL to member AGOL
• Create spatial View containing only Observations with QC Status = ‘Passed’
• Offline Basemaps
  • Create Offline Basemaps for use with Observations survey (Survey123)
  • Use offline basemaps
• Collect Data via Survey123
• Using the Observations Dashboards
• Toolboxes:
  • Observations toolbox for use with Biotics (within zip file)
  • BLM Observations toolbox for downloading survey data
  • Observations toolbox for Non-Biotics use for downloading survey data
  • Toolbox: Convert CO BLM Field Maps to CNHP Observations Survey
    
    
• The Observations Feature Layer, explained
• Update the dropdown lists within the Observations survey
• Survey Permissions - who can collect data, view data, and update the survey