How to Create a Site Collection in SharePoint Online?

Requirement: Create new site collection in SharePoint Online

How to Create a Site Collection in SharePoint Online?
Site collection in SharePoint is a logical group sites with a common top-level site and/or zero or more subsites organized as a hierarchy. Every site collection share common top site, navigation, security, content types, etc. To create a SharePoint Online Site collection from Browser, follow these steps:

• Login to SharePoint Admin Center as a tenant admin or SharePoint Online Administrator. 
• Click on "Site Collections" from left navigation >> Click on "New" >> and then "Private Site collection" to create a new site collection.
• The New Site Collection page appears. Set properties according to your requirement to create site collection. Such as: 
• Title and description for your new site, 
• Site Address (URL path) for the site
• Select the Template for your site collection, typically "Team Site" will do. 
• Set the storage quota, Site collection Primary owner for the site collection. 
• Click OK to start creating new site collection. Wait for a moment and your site collection should appear in the site collections list.
• Wait for a minute and this creates a new site collection in SharePoint online.
  
  

Create Modern Site Collection in SharePoint Online:
To create modern team site collection in SharePoint Online, use use "New SharePoint admin center"

• Go to new SharePoint Online Admin Center >> Click on "Create" from "Sites >> Active Sites" node
• Pick either "Team Site" option to create a modern team site collection with Office 365 group or "Other Options" to create a modern team site without Office 365 group.
  
• Pick the template as "Team site", Provide a Name, Administrator options and click on "Finish" to create modern site collection in SharePoint Online.
  

To create a site collection in SharePoint Online using PowerShell, use: How to Create a Site Collection in SharePoint Online using PowerShell?