I know having the Not Secure Padlock instead of having the Green Secure one on your web browser is one the most annoying & worrisome alarming message that you can't tolerate as a webmaster!
An SSL (Secure Sockets Layer) certificate is not only essential for your website security but also ensure proper site health & impact positively on your website SEO (Search Engine Optimization).
A recent survey on SSL certificate says, people really like Green Padlock on their website padlock, but don’t want to spend any money on it!.
The reason behind not having an SSL is a limited budget for buying the SSL & of course people wants the best one at the lowest possible price.
At the primary stage of launching the website, most of the people don’t want to spend any money until they start generating any revenue!.
But is this really a good idea of not having an SSL just to save money & later you must have to install it!