SEO friendly design means that your website must be responsive i mean your website must be device friendly.

There are two concepts of SEO, it's onpage and offpage. To create a SEO friendly design, you can go to google to find SEO onpage.

SEO friendly design is making your website friendly with search engine and your ranking can be higher in a short time. You can use a template for your website. Great wordpress portfolio themes that I'd love to choose every time. So, remember that web design is important for SEO.