Add Analyze Your Website Performance as an Internet TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1483 TILs and counting..._
+_1484 TILs and counting..._
 
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@@ -438,6 +438,7 @@ _1483 TILs and counting..._
 ### Internet
 
 - [Add Emoji To GitHub Repository Description](internet/add-emoji-to-github-repository-description.md)
+- [Analyze Your Website Performance](internet/analyze-your-website-performance.md)
 - [Check Your Public IP Address](internet/check-your-public-ip-address.md)
 - [Enable Keyboard Shortcuts In Gmail](internet/enable-keyboard-shortcuts-in-gmail.md)
 - [Exclude AI Overview From Google Search](internet/exclude-ai-overview-from-google-search.md)

internet/analyze-your-website-performance.md

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+# Analyze Your Website Performance
+
+The [PageSpeed Insights](https://pagespeed.web.dev/) tool from Google is a
+great way to quickly get actionable insights about where to improve your
+website and app's _Performance_, _Accessibility_, and _SEO_.
+
+To see how your public site or app does, grab its URL and analyze it at
+[PageSpeed Insights](https://pagespeed.web.dev/).
+
+It will take a minute to run on either Mobile or Desktop (make sure to check
+both) and then will output four headline numbers (out of 100) for each of the
+categories.
+
+You can then dig in to each category to see what recommendations they make for
+improving your score.
+
+This can also be run directly from Chrome devtools which is useful if you want
+to see how a locally running site is doing. You can run the analysis from the
+_Lighthouse_ tab of devtools. Note: if the _Performance_ score looks bad, it
+might be that you are running a non-optimized dev server that isn't reflective
+of how your site would do in production.