The short answer is yes, definitely. As long as you build a decent site, it can’t hurt your marketing efforts and has the potential to be a big help. Some of the things you can do with an internet presence for your restaurant:
Don’t try to do the whole thing by yourself. Your restaurant’s website is the first and sometimes only impression potential customers have of your business. People spend enough time online these days to know an amateur site when they see one. While it might seem like you’re getting away with getting a site up without having to pay for it, in the end you will pay because customers will notice. Writing the content for your business’ site will probably end up taking up much more time than you think, so you might as well let someone who knows what they’re doing handle the design and building of your site.
Follow best practices for design. Even if you do hire a designer for your site, familiarize yourself with design best practices for a restaurant website.
Don’t get too flashy. Design elements like Flash players look great, but from a practical perspective, they don’t help get customers to your restaurant at all. When someone lands on your home page, they want information and they want it fast. Flash takes a long time to download and while it ‘s pretty to look at, it’s not very informational.