## Search Engine Optimization (SEO)

The blog includes some of the most important tags to get indexed by a crawler. Furthermore, some aspects of the Open Graph specification are implemented.

### Robots.txt

In the wwwroot/ you can find a default robots.txt. It allows the site gets completely indexed. If you want to tweak that behavior - feel free.
Also, you can provide a sitemap.xml to get a better ranking. The blog can create a sitemap.xml on its own. For that log in and click on the `Admin` button in the navigation bar and afterward on `Sitemap`. There you can let the blog create a new one for you. This is especially helpful after you created a new blog post to make it easier for indexers like Google.

### Open Graph Tags

To get better results when for example shared via LinkedIn some of the `<meta property="og:tag">` tags are implemented.

The following tags are set depending on the page:

| Open Graph Tag | Index                                                     | Display Blog Post                                                           |
| -------------- | --------------------------------------------------------- | --------------------------------------------------------------------------- |
| og:title       | Title of the blog (defined in Introduction)               | Title of the Blog Post                                                      |
| og:url         | Url to the index page                                     | Url of the page                                                             |
| og:image       | Profile image (defined in Introduction)                   | Uses the preview image. If a fallback is defined this will be used instead. |
| og:type        | article                                                   | article                                                                     |
| og:description | Short description in plain text (defined in Introduction) | Short Description of Blog Post in plain text                                |

Furthermore, the following tags are set:

| Tag                                      | Index                                | Display Blog Post             |
| ---------------------------------------- | ------------------------------------ | ----------------------------- |
| Title of the web page                    | Defined in AppConfiguration.BlogName | Title of the blogpost         |
| &lt;meta name="keyword" content="" /&gt; | not set                              | Tags defined in the Blog Post |

### RSS Feed

This blog also offers an RSS feed ([RSS 2.0 specification](https://validator.w3.org/feed/docs/rss2.html)), which can be consumed by your users or programs like Feedly. Just append `feed.rss` to your URL or click on the RSS feed icon in the navigation bar to get the feed. The RSS feed does not expose the whole content of a given blog post but its title and short description including some other tags like preview image, publishing date and so on.

### Sitemap

This blog automatically generates a [sitemap](https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap) that lists all blog posts, the archive and pages of the blog.

## JSON LD
This blog supports a JSON-LD for structured data. The current support is limited / rudimentary. Information like `Headline` (the title of the blog post), `Author`, `PublishDated` and `PreviewImage` are present.

## Critical CSS
The blog offers an integrated tool, that generates critical CSS for the blog. Read more about it in the ["*Advanced Features*"](../Features/AdvancedFeatures.md) section.