How To Create A Site Collection In SharePoint 2013

Introduction

Before I explain about Site collection, I would like to share a few ideas about the hierarchy of SharePoint. There are four levels in SharePoint.
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You can create multiple numbers of Site Collections under a Web Application in SharePoint .Web Application is the parent of Farm in SharePoint .

Site Collection is the child of Web Application in SharePoint and the sub web is like a grand child of Site Collection in SharePoint.

What is Site Collection?
 
Site collection is the main part of SharePoint. You can create a site collection under a Web Application in SharePoint. You can create multiple site collections under a Web Application. You can also create a number  of Sub sites under a site colection in SharePoint. Below, I have listed a few mandatory fields to create a site collection in SharePoint.
  1. Title
  2. Description
  3. URL
  4. TemplateType
  5. Administrator
  6. Quota   
Example

A company having multiple branches in different countries plus different states. So, we have to create an application in SharePoint . Let's suppose, My company name is : RajInfotech and it's located in the USA, CANADA, INDIA, DUBAI . So here, I have to create a Web Application for RajInoftech. Rajinfotech is the parent and we have to create all branches under Rajinfotech main website.

URL : http:// Rajinfotech.com (Web Application Name)
We should create an all over branche under Rajinfotech Web application .
URL : http:// Rajinfotech.com/Sites/USA (USA :Site Collection)
URL : http:// Rajinfotech.com/Sites/CANADA (CANADA: Site Collection)
URL : http:// Rajinfotech.com/Sites/INDIA (INDIA: Site Collection)
In a country, If we have multiple braches then we have to create a Sub sites under a site collection like
URL : http:// Rajinfotech.com/Sites/INDIA/Bangalore (Bangalore : Sub Sites)
 
Steps for creating Site Collection in SharePoint  
 
Step1

Click on Start Button in your computer -> Search SharePoint Central Administrator.
 
Step2

Click on SharePoint Central Administrator -> go to Application Management -> click on Manage Web Application.
 
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Step3

Once you click on "Create a Site collection", It will redirect you to a new page where you can create Site Collection.

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Once the new page comes up, enter the Title of the site, and put the description.  Then, select the version. By default, 2013 is selected in the dropdownl  list .
 
Now, select the template type. So many types of templates are present over here. You can choose any one as per the requirement.

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In the above image, two types of Administrators are visible becuase someone will need to operate the site in absence of primary administrator. So, you should provide both the details here.
 
Primary administrator is the Global Administraor in site.
 
Select your Quota Template : To limit resources used for this site collection. After that, click on OK button. 
 
Step4

Next page will come up with success message.  Please look into the below images for confirmation.

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Step5

Go to the View Site Contents -> Check your Site Collection and open it.

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A new Site Collection has been created. Design your page as per the requirement.