How can I add a schema code for blogs in my website?

How can I add a schema code for blogs in my website?

The company who is providing SEO Service is asking that how to add schema code? Isn't it funny???

Just hire a developer and share your requirements. Rest will be done by the developer!

Go to Google's Structured Data Markup Helper.
Select the type of data that you plan to markup. ...
Paste in the URL of the page or article that you want to markup. ...
Highlight and select the type of elements to be marked up. ...
Continue adding markup items. ...
Create the HTML.

Which type of schema do you want to implement on your website?