Sea level rise from melting ice/snow?

I have heard some people say that melting ice doesn't have an impact on sea level so I was wondering... If snow is ice and snow and ice can be found on land, when they melt does it flow uphill or something? I was told that it doesn't increase sea levels. Is it because the water from melted snow and ice don't adhere to the laws of gravity? Is gravity a hoax too? Some scientists say it is so I am curious what you think.