M10 web optimization

Question 1

quantifies the experience of your site and identifies opportunities to improve

Answer 1

Web Vitals

Question 2

initiative by Google to provide unified guidance for quality signals that are essential to delivering a great user experience on the web.

Answer 2

Web Vitals

Question 3

the subset if web vitals that apply to all web pages, should be measured by all site owners, and will surface across all google tools

Answer 3

core web vitals

Question 4

three aspects of user experience the core web vitals focuses on currently

Answer 4

1. loading
2. interactivity
3. visual stability

Question 5

three core web vitals metrics

Answer 5

1. largest contentful paint (LCP)
2. Interaction to next paint (INP)
3. cumulative layout shift (CLS)

Question 6

metric that measures loading performance

Answer 6

largest contentful paint

Question 7

LCP should occur within ___ seconds

Answer 7

2.5

Question 8

metric that measures interactivity

Answer 8

interaction to next paint

Question 9

pages should have an INP of ___ milliseconds or less

Answer 9

200

Question 10

metric that measures visual stability

Answer 10

cumulative layout shift

Question 11

pages should maintain a CLS of ___ or less

Answer 11

0.1

Question 12

To ensure you’re hitting the recommended target for these metrics for most of your users, a good threshold to measure is the ____ of page loads, segmented across mobile and desktop devices.

Answer 12

75th percentile

Question 13

core web vitals tools that asses compliance consider a page passing if it meets the recommended targets at the ___ for all three of the Core Web Vitals metrics.

Answer 13

75th percentile

Question 14

lifecycle of the metrics

Answer 14

1. experimental
2. pending
3. stable

Question 15

are prospective Core Web Vitals that may still be undergoing significant changes depending on testing and community feedback.

Answer 15

experimental metrics

Question 16

are future Core Web Vitals that have passed the testing and feedback stage and have a well-defined timeline to becoming stable.

Answer 16

pending metrics

Question 17

are the current set of Core Web Vitals that Chrome considers essential for great user experiences.

Answer 17

stable metrics

Question 18

its purpose it to:
See if the metric actually works for what it’s supposed to measure.

Understand the problem it’s trying to solve.

Fix or improve older metrics that didn’t do the job properly.

Answer 18

experimental phase

Question 19

metric developed to address the runtime performance issues more comprehensively than First Input Delay (FID)

Answer 19

Interaction to next paint

Question 20

intended to give flexibility in a metric’s development by identifying bugs and even exploring changes to its initial definition. It’s also the phase in which community feedback is most important.

Answer 20

experimental phase

Question 21

an experimental metric has received sufficient feedback and proven its efficacy, it becomes a __

Answer 21

pending metric

Question 22

Pending metrics are held in this phase for a minimum of ___ to give the ecosystem time to adapt.

Answer 22

six months

Question 23

Community feedback remains an important aspect of this phase, as more developers begin to use the metric.

Answer 23

pending phase

Question 24

This is when the metric can become a Core Web Vital.

Answer 24

when a pending metric becomes a stable metric

Question 25

Stable Core Web Vitals metrics won't change more than ___ per year.

Answer 25

once

Question 26

collects anonymized, real user measurement data for each Core Web Vital. This data enables site owners to quickly assess their performance without requiring them to manually instrument analytics on their pages, and powers tools like Chrome DevTools, PageSpeed Insights, and Search Console's Core Web Vitals report.

Answer 26

chrome user experience report

Question 27

how do you measure core web vitals in javascript? what do you use?

Answer 27

web-vitals JavaScript Library - made to avoid the complication of manually measuring them through APIs

Question 28

the best way to test the performance of features during development—before they've been released to users. It's also the best way to catch performance regressions before they happen.

Answer 28

lab measurement

Question 29

tools that can be used to measure the Core Web Vitals in a lab environment

Answer 29

Chrome DevTools Lighthouse (instead of INP, use TBT instead)

Question 30

what do you call supporting metrics

Answer 30

proxy/ suppplemental metrics

Question 31

metrics that supplement the loading experience and the diagnosis of issues with LCP

Answer 31

Time to First Byte(TTFB) First Contentful Paint (FCP)

Question 32

metric that supplements in diagnosing potential interactivity issues

Answer 32

Total Blocking Time (TBT)