How to make the blog section wider in the below page where we read blogs.

Hi there,

Go to Customize > Additional CSS and remove this CSS:

.no-sidebar .inside-article > *, .no-sidebar #comments, .no-sidebar .nav-links {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

Let me know if you need more info :)