Choose sites to include in your search engine - Programmable Search Engine Help

Adding and excluding pages or sites from your search engine follow the same pattern. In both cases, you get three options, each with different behavior.  Include sites in your search engine

Google Analytics Setup

The Google Analytics Setup I Use on Every Site I Build — Philip Walton

Compare your mobile site speed

URL Inspection Tool

Workbox

JavaScript Libraries for adding offline support to web apps

Google HTML/CSS Style Guide

Create your first AMP page

Excellent guide to building AMP pages

Create AMP versions of your blog posts

– Perch CMS documentation

Mark Up Your Content Guide

– Google Developers

Easily Build Custom Reports and Dashboards

Google Data Studio