Any professional website creator or developer will tell you that it is super important to have proper security in place for your website.
There are several reasons but probably the most important are to protect your data, to protect the information of your website visitors and to avoid fines/lawsuits.
Website security protects data that is saved/stored within your website’s hosting space (where all content is kept).
An SSL Certificate provided data protection as it is being transferred (i.e. when someone submits information or downloads information).
If you are using WordPress, there are some plugins that help with security. If you are using some site builders, such as Wix or Squarespace, your SSL Certificate and security may be included in your monthly subscription fee.