Google Forms is a service offered by Google. Forms (surveys) are created by anyone with a Google Account. The form is saved on the user's Google Drive.
It is a very easy way to collect data online without much of a hassle. It provides you with a number of themes, to make the form look fancy and also a number of different controls (such as drop down, radio button, check box, date picker...)
You can share your form with others, and asks them to fill it out. All the responses to the form are saved in a spreadsheet file stored in Google Drive. Once you're done collecting responses, you can close the form and download the results.
It is free but you need a Google account.