Upload and download speeds are both important factors when it comes to internet speed. Upload speed is the amount of data that can be transferred to the internet in a given amount of time. This is especially important for people who use online tools that require uploading files, like video chats or sending large attachments from your New Jersey home. Download speed is the amount of data that can be transferred from the internet to your device in a given amount of time. This is important for streaming movies, downloading music, and surfing the web.