sitecollection-based-feature-name.ps1

#Example of getting site collection url based on feature Name
Add-PSSnapin Microsoft.SharePoint.PowerShell


$webapp= Get-SPWebApplication "http://www.sharepoint-journey.com/" 

# looping through all sitecollections

foreach($site in $webApp.Sites)
{
#Get the feature based on display name
$feature=Get-SPFeature -Site $site | Where-object {$_.DisplayName -eq "Branding"}

if($feature -ne $null)
   {
# Disply the site site collection URL
Write-host "Feature Activated at" $site.Rootweb.URL
    }
  }