What Is HTTPS?

How HTTPS Works

HTTP, the protocol browsers use to request web pages, sends its data as plain text. Anyone positioned on the network path — a shared Wi-Fi network, an internet provider, an intermediary server — can read that data or alter it before it arrives. HTTPS closes that gap by wrapping the same protocol in TLS (Transport Layer Security, the successor to SSL). The browser and server negotiate an encrypted channel, verified by a TLS certificate the server presents, so the request and response are scrambled in transit and any tampering is detectable.

For users, the visible payoff is the padlock in the address bar and the absence of a “Not secure” warning. For search, HTTPS is a ranking signal: a small, direct factor in Google’s algorithm, and increasingly a baseline expectation rather than a differentiator. It also underpins other technical SEO concerns — many modern browser features require a secure context, and a secure connection is part of a trustworthy page experience.

The important nuance is proportion. HTTPS is worth having, but its direct ranking weight is deliberately small. The larger SEO risk sits in the migration from HTTP to HTTPS, which is a full URL change and must be handled like one: a valid certificate, 301 redirects from every HTTP URL to its HTTPS equivalent, canonical tags and internal links updated to the secure addresses, an updated sitemap, and no mixed content where a secure page still pulls images or scripts over HTTP.

Example of HTTPS

The foundational documented event is Google’s announcement on August 6, 2014, titled “HTTPS as a ranking signal,” published on Google’s Webmaster Central (now Search Central) blog. In it, Google confirmed it had begun using secure, encrypted connections as a factor in its ranking algorithms after months of testing.

The wording set expectations that still hold. Google described the signal as lightweight, affecting fewer than 1% of global queries and carrying less weight than other signals such as high-quality content — while adding that it might strengthen the signal over time to push more of the web toward encryption. That framing is the practical lesson: HTTPS was never a ranking shortcut. Google positioned it as a nudge toward a safer web, backed by a modest algorithmic incentive. In the years since, the incentive shifted from carrot to expectation as browsers began flagging plain HTTP pages as “Not secure,” making the absence of HTTPS a user-trust liability well beyond the small ranking factor Google first described.

Frequently Asked Questions

The Bottom Line

HTTPS is HTTP wrapped in TLS encryption — the difference between data anyone can read in transit and data that is scrambled and tamper-evident. Google has counted it as a lightweight ranking signal since 2014 and browsers now shame the plain-HTTP alternative, so it is a non-negotiable baseline rather than a growth tactic. The ranking risk lives not in adopting HTTPS but in migrating carelessly, so redirect and re-reference everything cleanly.