SharePoint 2013 : How to Change Site Logo Programmatically using PowerShell?

Changing the logo is a basic  when it comes to branding SharePoint 2013 sites.

If you have more site collection in SharePoint ,hundred of site collection with subsites , go with sharepoint Powershell script

Get-SPWebApplication "http://sharepoint.crescent.com" | Get-SPSite -Limit "All" | Get-SPWeb -Limit "All" |  foreach { $_.SiteLogoUrl=""; $_.update(); Write-host "Changing Logo for:"$_.Url;  }