An SSL certificate secures your website from hackers and third parties. SSL certificates create a virtual padlock in the browser address bar confirming that you are communicating with trustable and secured servers.
Your SSL certificate is a confirmed credential that you are who you say you are which builds trust.
Google made an announcement back in 2018 which stated it will mark all websites without a SSL Certificate as "Not Secure".
Even if you're not selling something, every website needs an SSL Certificate.
Every website we create includes one.