Do you consider SEO in your AngularJS application?

Search Engine Optimisation (SEO) with a Single Page Application (SPA) needs consideration like any other Framework to ensure it is SEO friendly. Because AngularJS manages your routing and URLs it is important to be aware of the differences in making an AngularJS SPA SEO friendly.

If you ignore your SEO in an Angular SPA you may not have your pages indexed by Google and lose your ranking with SEO. If your pages are not being rendered to Google's bots when they crawl your site, Google cannot see your pages and it is like they do not exist.

It is not enough to just use hashes in your URLs (e.g., example.com/index.html#mystate, where #mystate is the hash fragment) or hope Google can crawl an Angular application correctly. You can read more here Guide to AJAX crawling for webmasters and developers. There are several libraries to help pre-render your code available on the internet.

If you do not pre-render HTML you may still get good enough SEO as Google Bots are getting better at crawling JavaScript but you cannot be certain it will work. You can use Google Fetch to test how your web pages look to a Google bot.

Figure: How to configure your site to pre-render HTML for Google bots.

Besides pre-rendering HTML to get your AngularJS Single Page Application (SPA) SEO friendly you can apply the following practices:

1. Enable html5Mode for AngularJS outing This will remove the hashtagged-URLs by default for pretty URLs, using the pushState feature that newer browsers have, which still falls back to the hashbang method if pushState isn't available. To enable html5Mode in AngularJs read https://scotch.io/tutorials/pretty-urls-in-angularjs-removing-the-hashtag.
2. Creating a sitemap Web crawlers usually discover pages from links within the site and from other sites. Sitemaps supplement this data to allow crawlers that support Sitemaps to pick up all URLs in the Sitemap and learn about those URLs using the associated metadata. Using the Sitemap protocol does not guarantee that web pages are included in search engines, but provides hints for web crawlers to do a better job of crawling your site. More information at sitemap.org
3. Enriching your app with meta information This step ensures your search results are represented in a meaningful and predictable way. Dynamically changing the meta tags content in the head section of the page can also help google find and represent you in their search results.
4. You can inspect what HTML Google renders with Webmaster Tools , it is also an excellent source of information.
5. Here’s what you need to know to ensure your website is crawled correctly by Google in general regardless of if your application is a SPA: Introduction to SEO and Google Tools – Craig Bailey [FireBootCamp]

Source: https://developers.google.com/search/blog/2014/05/understanding-web-pages-better