SSL Certificates are small data files that digitally bind a cryptographic key to an organization’s details. When installed on a web server, it activates the padlock and the https protocol and allows secure connections from a web server to a browser, any data sent from your website will be encrypted.
Google announced last year that they are beginning to favor secure websites over non-secure websites in search rankings, the implications are very small and Firefox are yet to stop displaying non-secure websites, but Chrome has started to flag up sites that are insecure. This could potentially turn a few people away from your website.
If you accept online payments, store member information, have forms, user logins or any general interaction with your customers it’s advisable to ensure your website is secure as your customers or clients want to know that your site is trustworthy and protected.
Even such as entering your email address through a contact form will be vulnerable to third party access if your site operates only on HTTP. Securing this information with SSL encryption (https) immediately reduces the risk of unwanted sharing of your data.