PowerShell script to obtain the most viewed document in SharePoint folder, document library and site

Hi @Nishanth Chakkere Ramesh, 

Thank you for posting your question in the Microsoft Q&A forum. 

Based on my research, there isn't a PowerShell script available to retrieve the most viewed document in a SharePoint site. 

Fortunately, after testing, I have found a possible method using PowerShell through PnP Online. Please follow the instructions in this article How to connect to PnP Online with Interactive Authentication to connect PnP PowerShell in your PowerShell environment. 
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After completing PnP configuration, run these below commands in PS (You should use PowerShell 7.5 for a more effective configuration) 

#Install  
Import-Module PnP.PowerShell 
# Connect to SharePoint site  
Connect-PnPOnline -Url "https://yourtenant.sharepoint.com/sites/yoursite" -Interactive –ClientID <your application ID>    
#Execute Search  
$SiteURL = "https://yourtenant.sharepoint.com/sites/yoursite/Shared%20Documents" 
$SearchQuery = "* Path:" + $SiteURL 
  
$SearchResults = Submit-PnPSearchQuery -Query $SearchQuery -All -TrimDuplicates $False -SelectProperties Filename, Author, Size, ListItemID, LastModifiedTime, ViewsLifeTime 
  
#Collect Data from search results 
$Results = @() 
ForEach ($ResultRow in $SearchResults.ResultRows)  
{      
    $Results += [pscustomobject] @{ 
        Filename   = $ResultRow["Filename"] 
        Author = $ResultRow["Author"] 
        Size = $ResultRow["Size"] 
        LastModified = $ResultRow["LastModifiedTime"] 
        ListItemID     = $ResultRow["ListItemID"] 
        ParentFolder = $ResultRow["ParentLink"]          
        ViewsLifeTime = $ResultRow["ViewsLifeTime"]        
        URL       = $ResultRow["Path"] 
    }  
} 
$Results 
 
# Sort by ViewsLifeTime in descending order and select the top item 
$TopViewed = $Results | Sort-Object ViewsLifeTime -Descending | Select-Object -First 1 
  
# Export or display the file with the most views 
$TopViewed | Select-Object Filename, ViewsLifeTime

I hope this helps! If you have any other questions, feel free to ask.

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