Of late, there is a great buzz around the use of Progressive Web Apps or PWAs for rendering your websites or applications. The central idea of a PWA is to create an enhanced website that has an app like behavior and qualities for ease of use on any device and platform.
One of the key differences between traditional web apps and PWA is that traditional web applications render HTML on the server. For instance, WordPress, Magento, Ruby on Rails, and some of the most common web apps and frameworks are built this way.
Server-side rendering of web apps deliver complete pages to browsers and crawlers alike, and this is how the content is optimized from the SEO perspective.
Progressive Web Apps are essentially the conclusion of this trend. PWA leverages web technologies like Service workers, Web App Manifests and Cache API to deliver a native app-like web experience. But with the added benefit of performance, seamless page transitions, offline functionality and a home screen on mobile devices.
This led to the rapid adoption of PWA by well-known products and services. Pinterest, for example, rebuild its application in its PWA avatar and saw several benefits. These include improved engagement by 60% and a 40% increase in user-led ad revenue. And many others like Uber, Flipkart, Tinder, Starbucks, etc. adopted the use of PWA for their apparent benefits.
And there are obvious business advantages to PWAs. But what about SEO?
It is a valid concern if you are new to the world of PWAs and toying with the idea of switching over.
Do Bots Crawl PWAs?
Tools like Babel will transpile your JS files to more widely used and supported versions. Alternatively, you can use server-side rendering to present the crawlers with pre-rendered pages.
In addition, here are some great SEO tips that will further improve the usability and searchability of your PWA sites.
- Optimize for other search engines: When it comes to visibility and searchability online, Google is not the only search engine. Where Google may crawl your PWA correctly, it might have issues with other search engines which might be important and necessary for your business.
- Using canonical URLs: Many businesses deploy a PWA but also leave their original desktop or mobile sites in place. This may cause the issue of duplicate content if the pages are not canonicalized correctly. Each PWA page should specify its canonical URL (the original page that is meant to be indexed) using the canonical attribute.
While enabling PWAs along with non-canonical AMP, then use the rel=”amphtml” tag to specify the AMP urls.
- Dynamic serving: Often dynamic serving is used to show different designs based on the user device. Ensure that the content is always the same for search bots and users to avoid cloaking. Secure website
- Secure website: Ensure the website is secure and run entirely using HTTPs, with 301-redirects from HTTP to HTTPs and avoiding non-secure resources. You can use an HTTPs migration checklist if you haven’t done that already.
- Page load speeds: Pay attention to the loading times of your pages. You can achieve more speed by using PWAs with AMP (PWAMP) and also following some performance optimization best practice. You can use tools like WebPageTest and Lighthouse to find out your time to the first interaction. This is the key page-speed metric Google uses to measure page speed.
- Progressive Enhancement: While service workers are excellent, PWAs use progressive enhancement. That is, they should work well even if the browser doesn’t support modern functionality, such as a search engine spider.
- Use a Search Console for Testing: Fetch as Google is a helpful tool that allows you to see how Google reads your pages.
- Don’t forget the Sitemap: Add a sitemap to your website and register it in the Google Search Console for your website. This is the first thing that Google will use to know the pages that exist on your website.
To sum it up
PWAs already have the unique advantage of being highly usable, lightweight and mobile-friendly. By taking care of the above-mentioned SEO best practices, you can rank better and provide an optimum user experience. If you want further information on this, check out Google’s PWA checklist, which can help you take your PWA from baseline to exemplary levels.
If you are looking for more detailed post on PWA-SEO, you can read SEO for Progressive Web Apps.