Malwares are malicious software which affects the website files to steal confidential information and show unwanted display messages. The statistics says that more than 40% of the sites on the web are infected with malwares. When a site is infected, Google will show a warning message in the search results and on the browser. Generally the infected site is demoted in search results or even removed if no action is taken by the site owner. So it is important to monitor the status of your site to ensure it is not infected with any malwares.
Google offers a site status checking tool to check the site is safe for browsing. Here is a free tool to enter your domain and find the safe browsing status from Google. Once you click on the submit button the result will open in a pop-up window showing the privacy & security page of Google along with the information of safe browsing status.