How to build a web page using different sections created in Craft I am a beginner in Craft. I have a Craft website. There is an HTML design with me. From admin, I divided the HTML into sections and created entries based on that. All the coding related to each sections done. 

My question is, from where we will combine these sections for creating a page on the website? 

I want to replace some already existing sections with new sections created.
From which part I can find this one?
Actually, not all sections are created equal. Craft actually has three different types of sections:

Singles
Channels
Structures

Well, you need to work with dynamic URLs and Twig to show your sections at Web Page.
Here is the link of official documentation of Craft CMS:
https://craftcms.com/docs/2.x/sections-and-entries.html#sections