Responsive design is a popular web design strategy used by some of these site builders. This approach reformats the same webpage content to fit different screens. But in terms of SEO (search engine optimization), the search engines only care about whether a site displays suitably on mobile screen sizes. Both Bing and Google have pages where you can enter your URL to see if your site plays on mobile acceptably.
While the the best of them offer surprising amounts of flexibility, they also impose stringent enough restrictions to page design that you shouldn't be able to create a really bad looking site using one of these services. Typically you can get a Mysite.servicename.com style-url with no commerce abilities for free from one of these services; you have to pay extra for a better URL and the ability to sell. One issue to consider is that if you eventually outgrow one of these services, it can be hard to export your site to a full scale advanced web hosting like Dreamhost or Hostgator. If you know that's where you are eventually going, it may be better to skip the sitebuilder step. Marketplace Template: Build and launch an online marketplace in less than 2.5 hours
Absolutely. You have the option to customize your website based on your business needs. You can add site content wherever you’d like in a variety of sections; from multiple site pages, to scrollable sections that you can add to each of those pages, to a gallery of images, menus and price lists, and YouTube or Vimeo videos. Each section in your website is customizable as well, from the name of the page, to your website’s navigation bar. You’ll also have the ability to change text colors, styles and font. It’s important to make a responsive website that is mobile and desktop friendly. With Website Builder you’ll be able to choose tablet and desktop layouts to give your visitors the experience you want them to have.