I can see in the Magento marketplace, there are so many third party extensions are available. My doubt is, if we want to implement the small functionalities like Scroll to top, banner slider, etc., 'do we need to use extensions because we can simply make them by adding some small scripts?' So what is the point of these extensions.
Also, I want to know do we really need modules to add functionality?
I want to add price slider in category page of my website. For achieving this, do i need to use module/extension?
Thanks for your time. Looking for your reply.