{Till some time back|Till few years back" very few bothered if your website was running on HTTP or HTTPS. Infact the term was not known to many and very few knew about the trusted seals offered by security companies. If you had an SSL certificate you were considered Is your website secure to be someone who was overly cautious about client security.
Things changed as Google released an update to Chrome in Feb 2018
Google Chrome and subsequently all the other browsers started marking websites which were not using SSL as insecure.
Need to know why you need an SSL?