After the announcement of Google’s compulsion towards installing an SSL/TLS Certificate, it can affect it, because if the SSL certificate is not installed on the website, it will start displaying the “Not Secure” message or worst website will stop loading in any of the popular web-browser. Again, content is more important. If there’s an SSL certificate, but the website is not user-friendly or content is not relevant to users need, it will be useless, which will make a negative impact on the SEO of a website. In other words, low traffic and lower conversions. Lastly, a user may get a boost in ranking due to SSL/TLS Certificate installed on it.