Get Web title - Sharepoint Online Powershell

Install the module 

Install-Module -Name Microsoft.Online.SharePoint.PowerShell

Sample Script

$loadInfo1 = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client")

$loadInfo2 = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.Runtime")

$siteUrl = "https://tenant.sharepoint.com"

$username = read-host "type username"   #example admin@tenant.onmicrosoft.com

$password = read-host "type password" -AsSecureString

#========================= Client context ===============================

$spocred= New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username,$password )

$ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl)

$ctx.Credentials = $spocred

$web = $ctx.Web

$ctx.Load($web)

$ctx.ExecuteQuery()

Write-Host " Current web title is '$($web.Title)' "