HTTPS stands for Hypertext Transfer Protocol Secure, which is a secure version of HTTP. It encrypts the data being transferred and ensures that it cannot be intercepted by third parties. Implementing HTTPS involves obtaining an SSL (Secure Sockets Layer) certificate, which is particularly important for websites that collect sensitive information. In addition to the security benefits, there are also SEO advantages to using HTTPS. Google marks all non-HTTPS websites as 'not secure' in Chrome and has been using HTTPS as a ranking signal in their search algorithm since 2014.