How to use form on my website?

Yes you can and there are multiple options to do that. Depending on how would you like to embed your form. You can download whole source code and edit it to fit your needs. Also you can download code specific for certain platform: Wordpress, Dreamweaver, Facebook, Joomla etc. And you can download your form in iFrame code that you can embed in your website without concern that your form can be in conflict with rest of your website. For more info regarding embedding please check this guide.

Please let us know if you have further questions.