How to create special offer schema markup code?

First of all, we have to understand what is Schema markup, Schema markup is a script, and this script we add on the website backend is specially created for search engines ( Google, Bing ).
Because ranking on google snippets we required schema markup code on our website.
When we try to get rank our article on google para snippets, we need article schema markup code on that web page. And schema markup code, we can generate from schema markup generator tools.