Update quality-foundation-implementation-guide.mdx

collapsers, prerequisites, installation

src/content/docs/new-relic-solutions/observability-maturity/customer-experience/quality-foundation-implementation-guide.mdx

@@ -49,18 +49,93 @@ Quality Foundation measures the following KPIs:
     This KPI measures the number of JavaScript errors per page view.
 
     **Goal:**
+
     * Remove irrelevant JavaScript errors being tracked either by tuning ingest or using filtering.
     * Reduce JavaScript errors that impact customer performance.
 
   </Collapser>
+
   <Collapser
     id="http-errors-kpi"
     title="HTTP error rate KPI"
   >
     HTTP errors (or HTTP `4xx` and `5xx` responses) happen when calls to the backend are not successful.
 
     **Goal:**
+
     Measure and reduce the HTTP error rate to ensure your customers are able to do what they came to your site to do.
 
   </Collapser>
+
+  <Collapser
+    id="ttfb-kpi"
+    title="Time to first byte KPI"
+  >
+    This KPI measures the time from navigation start (a user clicking a link) to the browser receiving the first byte of the response from the server.
+
+    **Goal:**
+
+    Reduce the time to first byte by improving CDN, network, and service performance.
+
+  </Collapser>
+
+  <Collapser
+    id="core-web-lcp-kpi"
+    title="Core web vitals: Largest contentful paint (LCP) KPI"
+  >
+    [Core Web Vitals](https://web.dev/vitals/) are part of Google’s [Page Experience Metrics](https://developers.google.com/search/blog/2021/04/more-details-page-experience). They measure the experience from when a page begins rendering. Largest Contentful Paint (LCP) measures the time it takes to load the largest image after a user has navigated to a new page.
+
+    **Goal:**
+
+    * Reduce LCP to 2.5 seconds or better for the 75% percentile for all pages or at least the most critical pages.
+    * Reduce FID to 100 milliseconds or better for the 75% percentile for all pages or at least the most critical pages.
+
+  </Collapser>
+
+  <Collapser
+    id="core-web-kpi"
+    title="Core web vitals: First input delay (FID) KPI"
+  >
+    This KPI measures the experience from when a page begins rendering.
+
+    **Goal:**
+
+    Reduce FID to 100 milliseconds or better for the 75% percentile for all pages or at least the most critical pages.
+
+  </Collapser>
+
+  <Collapser
+    id="layout-shift-kpi"
+    title="Cumulative layout shift (CLS) KPI"
+  >
+    This KPI measures how much the page layout shifts during render.
+
+    **Goal:**
+
+    Maintain a score of 0.1 or less for the 75% percentile for all pages or at least the most critical pages.
+
+  </Collapser>
+
 </CollapserGroup>
+
+## Prerequisites
+
+### Required knowledge
+
+* Familiarity with [synthetic monitoring](/docs/synthetics/synthetic-monitoring/getting-started/get-started-synthetic-monitoring/)
+* Familiarity with [browser monitoring](/docs/browser/browser-monitoring/getting-started/)
+* Familiarity with [basic Browser UI views](/docs/browser/browser-monitoring/getting-started/introduction-browser-monitoring/)
+* Familiarity with [SPA data in Browser UI](/docs/browser/single-page-app-monitoring/use-spa-data/view-spa-data-browser-ui/)
+
+## Required Installation and Configuration
+
+* [Browser Pro installed in all pages](/docs/browser/browser-monitoring/installation/)
+* [SPA enabled for single page applications](/docs/new-relic-solutions/best-practices-guides/full-stack-observability/browser-monitoring-best-practices-guide/#how-to-do-it)
+*  Synthetics monitors configured:
+
+    - [Ping monitors configured for anonymous users ](/docs/synthetics/synthetic-monitoring/using-monitors/add-edit-monitors/)
+    - [Scripted synthetics check configured for login flow](/docs/synthetics/synthetic-monitoring/using-monitors/store-secure-credentials-scripted-browsers-api-tests/)
+    - Monitors should be configured to [test from all regions applicable to your users](/docs/synthetics/synthetic-monitoring/using-monitors/add-edit-monitors/#setting-location)
+    - Monitors should be configured for each domain and each login flow
+* Data retention for browser events is at least 2x an average sprint.
+