An SEO Friendly Directory website needs:

1. SEO friendly URL and html code

2. Avoid JavaScript navigation. Real links in navigation. Each DHTML navigation element is a real link so that search engines can follow.

3. Directory CMS which allows complete control of on-page factors like Title, description, keywords, h1, h2, links and alt tags which is unique to each page.

4. Real page names. Each page in savvy has a real name that you can control. You can also create as many folders and sub folders as needed to store your pages in a sensible way to both users and search engines.

5. Easily change the text of your site when you need to tweak your keywords.

6. Use CSS positioning or table structure for your template layout.

7. Easily embed your favorite analytics and measurement software into the templates to monitor your progress. 

So before deciding on your choice of Directory Software, acquire some knowledge about the different types of Directory CMS Software and it’s functioning with SEO.