You can represent your brand or company on Facebook perfectly with a Facebook company page (called a "fan page"). Facebook users can find your fan page at Facebook, contact you and mark your page with "Like".

Unlike private Facebook profiles created by and for a private individual, Facebook fan pages provide a range of functionalities for keeping connected with "fans" of your company.

Creating a Facebook Page

Just follow Facebook's  instructions to create your Facebook page:
Creating a Facebook Page

Tip: Be sure to place a link to your website on your Facebook page.
This will allow prospective customers to easily access your website and you benefit from more website visitors.

You should place a link to your Facebook page on your website to help your Facebook page get lots of fans quickly. Facebook offers "social plug-ins" with which you can place a "Like" button directly on your website.

As a MyWebsite user,  you can activate the  X (Twitter) Follow button directly in your website editor. If you use another system to manage your website, you can find the official guide on including a "Like" button on Facebook:
Including a "Like" Button on Your Website

Tip: You can convert your private Facebook profile into a Facebook page at any time:
Converting a Facebook Profile Into a Facebook Fan Page