SSL provides data encryption between web servers and users. Especially for any eCommerce sector security is the main aspect to look out for as users provide their confidential data as debit/credit data or any payment details.

SSL provides strong encryption, protects personal data, and PCI Compliance. And apart from this how does SSL boost Google's ranking you can check out this - https://www.ssl2buy.com/ssl-certificate-google-rankings

In this advanced technology era, security is the one of primary concerns to prevent any fraud, data loss, phishing, and so on.