Which one is gramatically correct 'click on it' or 'click it'?

Which one is gramatically correct 'click on it' or 'click it'? click one of Some users like to click twice or more on the Submit button especially if the postback does not respond immediately This scenario can bring clickbank log in Title:One Thing One Click: A Self-Training Approach for Weakly Supervised 3D Semantic Segmentation Abstract:Point cloud semantic segmentation

clickbank log in Cost per click is an online advertising revenue model by which publishers charge advertisers each time a user clicks on a display ad

clickbankcom login one events Type: String One or more space-separated event types and optional namespaces, such as click or In one click is more commonly used to emphasize the speed or ease of performing an action, while at one click is less common and may sound