Added guide for navigation configuration

docs/data-privacy.md

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+---
+template: overrides/main.html
+---
+
+# Data privacy
+
+In itself, Material for MkDocs does not perform any tracking and should adhere
+to the [General Data Protection Regulation][1] (GDPR), but it integrates with
+some third-party services that may not.
+
+  [1]: https://en.wikipedia.org/wiki/General_Data_Protection_Regulation
+
+## Third-party services
+
+### Google Fonts
+
+Material for MkDocs makes fonts [easily configurable][2] by relying on Google
+Fonts CDN. Embedding fonts from Google is currently within a gray area as there's
+no official statement or ruling regarding GDPR compliance and the topic is still
+[actively discussed][3]. If you need to ensure GDPR compliance, you may disable
+the usage of the Google Font CDN with:
+
+``` yaml
+theme:
+  font: false
+```
+
+When Google Fonts are disabled, Material for MkDocs will default to __Helvetica
+Neue__ and __Monaco__ with their corresponding fall backs, relying on system
+fonts. You can easily include your own, self-hosted webfont by [overriding][4]
+the `fonts` block.
+
+  [2]: guides/changing-the-fonts.md
+  [3]: https://github.com/google/fonts/issues/1495
+  [4]: customization.md#overriding-template-blocks
+
+### Google Analytics and Disqus
+
+Material for MkDocs comes with optional [Google Analytics][5] and [Disqus][6] 
+integrations, both of which must be enabled explicitly.
+
+  [5]: getting-started.md#google-analytics
+  [6]: getting-started.md#disqus