SSL certificate - all advantages and disadvantages

An SSL certificate is now a standard for every website, not an optional extra. It provides a secure connection between the user’s browser and the server where the website is hosted. When a website uses HTTPS, data is transferred in a more secure way and the browser does not show a warning that the connection is not secure.

The topic, however, is not limited to “having a padlock in the browser”. An SSL certificate has clear advantages, but also some limitations. It helps with security, trust, and the technical SEO foundation, but it does not solve all website problems on its own.

What is an SSL certificate?

An SSL certificate is a digital certificate that allows a secure connection between the website and the user. In practice, we often use the term SSL certificate, although modern secure connections actually work through TLS. The name SSL has remained as the popular term.

When a website has a properly configured certificate, its address starts with HTTPS instead of HTTP. This means that the connection between the browser and the server is encrypted. This reduces the risk of interception or replacement of information while the page loads. HTTPS also helps prevent interference in the communication between the website and the browser, including content replacement along the way.

How does an SSL certificate work?

When a user opens an HTTPS website, the browser checks the server certificate. If the certificate is valid and issued for the correct domain, a secure connection is created.

After that, the information between the browser and the website is transferred in encrypted form. This is important for contact forms, profile login, orders, payments, subscriptions, and any actions where the user sends data.

For the visitor, the result is simple. They see that the website uses HTTPS and do not receive a warning about an insecure connection.

Advantages of an SSL certificate

Data protection

The most important advantage is the protection of data during transfer. This is important for online stores, websites with user profiles, inquiry forms, bookings, and payments.

An SSL certificate does not automatically make the website fully protected, but it creates a basic level of security in the communication between the user and the server.

More trust from visitors

Users increasingly pay attention to whether a website looks secure. If the browser shows a warning that the connection is not secure, this directly affects trust.

On a website without HTTPS, some people will refuse to send an inquiry, fill in a form, or place an order. This is a problem not only for security, but also for conversions.

A required foundation for online stores

For an online store, an SSL certificate is required. Customers enter personal data, addresses, phone numbers, email addresses, and sometimes payment information. Even when the payment is handled through an external provider, the website should use HTTPS.

The SSL certificate is part of the trust in the entire purchase process. If it is missing, the user has a valid reason to doubt the security of the store.

Technical foundation for SEO

Google confirmed HTTPS as a ranking signal back in 2014, although as a light signal compared to factors such as quality content. This means that an SSL certificate alone is not enough for good rankings, but its absence is a weak technical signal.

For SEO, the overall setup is more important. HTTPS should be active correctly, HTTP addresses should redirect, canonical addresses should be correct, the sitemap file should contain HTTPS URLs, and there should be no mixed content issues.

Better compatibility with modern technologies

Many modern web APIs, functionalities, and browser capabilities require a secure environment. HTTPS is also important when working with HTTP/2 and newer technologies, especially for real online stores.

Disadvantages and limitations of an SSL certificate

Paid certificates have a price

There are free SSL certificates, but there are also paid options. Paid certificates make sense for more specific needs, corporate websites, additional validation, more complex infrastructure, or requirements from the organization.

For a small business website or a standard WordPress website without complex requirements, a free certificate is often enough. For larger projects, the choice should be made according to the risk, scope, and needs.

Renewal is required

SSL certificates have a validity period. Let’s Encrypt states that its standard certificates are valid for 90 days and recommends renewal at 60 days. The organization has already announced a plan to gradually reduce the period to 45 days by 2028, which makes automatic renewal even more important.

If the certificate expires, the website starts showing a security warning. This harms trust and stops some users before they even see the content.

Risk of mixed content

Mixed content appears when the page loads through HTTPS, but part of the resources on it load through HTTP. These are most often images, scripts, styles, iframe elements, or old internal links.

The result is a display issue, browser warnings, or blocked resources. During a redesign, migration, or SSL activation, this should be checked carefully.

Incorrect migration from HTTP to HTTPS harms SEO

Activating an SSL certificate alone is not enough. If the website opens through both HTTP and HTTPS, if 301 redirects are missing, or if the sitemap file contains old addresses, Google will receive mixed signals.

For a website with accumulated organic traffic, this is a serious risk. This is why HTTPS migration should be planned as an SEO task, not only as a technical setup.

SSL does not solve all security problems

The SSL certificate protects the connection, but it does not automatically protect the website itself from weak passwords, infected plugins, an outdated system, poor code, or a breach in the admin panel.

It is a foundation, but not a complete security strategy. For WordPress website maintenance, for example, regular updates, access protection, backups, monitoring, and proper hosting settings are needed.

Cloudflare SSL should be configured correctly

Cloudflare offers different SSL modes. In Flexible mode, the connection between the user and Cloudflare is through HTTPS, but the connection from Cloudflare to the origin server is through HTTP. This means partial protection and is not a good choice for a website that processes sensitive data.

In Full mode, Cloudflare uses HTTPS to the origin server as well, and in Full strict mode there are stricter requirements for the certificate on the origin server. For real business websites and online stores, the setup should be chosen carefully.

Types of SSL certificates

Free SSL certificate

Suitable for many standard websites, blogs, business websites, and small online stores. Most often, it is used automatically through a hosting panel or through Let’s Encrypt.

Paid SSL certificate

Suitable for higher requirements, specific contractual terms, a need for clearer certificate management, or corporate infrastructure.

DV certificate

The Domain Validation certificate confirms that the applicant controls the domain. This is the most common type of certificate.

OV certificate

The Organization Validation certificate includes verification of the organization. It is suitable for companies that want a higher level of formal identification.

EV certificate

The Extended Validation certificate requires a more detailed check. Today, the visible effect in browsers is not as strong as before, but for some organizations it still makes sense because of internal requirements or trust policies.

Wildcard certificate

The Wildcard certificate covers the domain and its subdomains from one level. For example, blog.example.com, shop.example.com, and app.example.com. It is suitable for websites with multiple subdomains.

Most common mistakes when setting up SSL

The mistakes are usually not in the certificate itself, but in the way it is activated.

The most common problems are:

• HTTP and HTTPS versions open at the same time

• 301 redirects are missing

• canonical addresses point to HTTP

• the sitemap file is not updated

• internal links remain with old addresses

• there is mixed content

• the certificate does not renew automatically

• Cloudflare is set to the wrong mode

After SSL activation, a full check is recommended. This includes a browser check, website crawl, redirect test, form check, sitemap, canonical addresses, and Google Search Console.

Quick lifehack: check the website in "incognito" mode using mobile internet

Open the website in an incognito window on your phone, but use mobile internet instead of the office Wi-Fi. This way, you will see how the HTTPS connection behaves for a real user, without cached data, saved sessions, or local settings.

Check three things:

whether the website opens directly with https://

whether the browser shows a security warning

whether all images, buttons, and forms load normally

If the website works correctly only through Wi-Fi or only after refreshing, there may be an issue with cache, redirects, Cloudflare settings, or mixed content. This is a good quick test before assuming that the SSL certificate is configured correctly.

Should every website have an SSL certificate?

Yes. Every public website should have an SSL certificate. This applies not only to online stores, but also to business websites, blogs, portfolios, platforms, media websites, and landing pages.

The reason is simple. HTTPS is now a standard for trust, security, and normal work in browsers. Even a website without payments often has a contact form, newsletter, chat, comments, or analytics tools. This is enough reason for the secure connection to be required.

How Studio Kipo helps with SSL and HTTPS settings

At Studio Kipo, we view the SSL certificate as part of the technical foundation of the website. For new websites, WordPress projects, and online stores, the HTTPS setup should be correct from launch.

We can help with:

• checking the current SSL setup

• activating HTTPS

• setting up 301 redirects

• fixing mixed content

• checking canonical addresses and the sitemap

• SEO control after migration from HTTP to HTTPS

• maintenance of WordPress websites and online stores

An SSL certificate is not complicated for the user, but incorrect setup creates real problems. This is why it is important to set it up correctly, especially for a website with organic traffic, online orders, or active advertising campaigns.

If your website does not have an SSL certificate or the HTTPS setup does not work correctly, the Studio Kipo team can perform a check, setup, and SEO control after the change.