Why is SSL important? It protects data in transit as it transverses over routers on the internet. From simple web pages to business transactions and purchases your data is worth something to someone.
In the age of shared and open WiFi it’s very easy for someone to ease drop on your traffic and possibly use the information collected to attack you and your assets. For the most part if you are looking at websites and forums the worries are advertisers watching you to hacker(s) watching to build a dossier for use in exploiting your assets.
With that said Lets Encrypt is a Free option to secure your data with a free certificate to be used in your web server. While only in beta, The project is showing amazing progress.