User Interface is the website design that appears in Users computer. It really effect the traffic on you website. If you want to get more traffic Apart from SEO It's the major Place where you need to put in efforts. If you come up with a website that's Users Friendly than for sure you will be promoted by the users as well as they will visit your site again. It's Somehow similar To On Site Shop , If your shop's outlook is good Than you are going to attract mere costumers to it. Try to avoid providing fake links in your website, like if you have any thing downloadable on your website don't make it difficult for users. Just make it one click download. Definitely they area going to attract more visitors to your website.