Will be keeping the content part of this post fairly short as the majority of the informative content resides within the attached video.
Righto, the main purpose of this post and video is to bring to your attention that Google is releasing another Google Algorithm update in October 2017 that will be focusing on providing more relevance and importance to websites that have the https protocol enabled on their website. The update will be more so targeted to Chrome browsers which fulfil the majority of all browsers on the internet.
Users who are using Chrome and come across a website with a web form will receive a notification that the website is not secure. Naturally, this notification will put visitors off using your website and will be unlikely to return. It is therefore in your best interests to upgrade to https to not only provide a better user experience, but to also secure your current rankings as https continues to to become a more prevelant ranking metric over time.
If you wish to read more on the subject, head on over to the very well trusted 'Search Engine Land' link provided below: