(2021) How to use GTmetrix Speed – a popular tool to test website speed


Website speed greatly affects the bounce rate of customers on your website. In the article below, Magepow will help you website speed test GTmetrix Speed.

1. What is Website Speed GTmetrix

GTmetrix is a tool to test the speed website, thereby measuring website performance according to many different scores. This is a popular and reliable tool used by many people today.

GTmetrix’s feature-rich system will help you evaluate your website based on your scores. Accompanying it are suggestions of solutions for you to improve the speed and upgrade the website.

GTmetrix versions include both free and paid versions. You can experience the basic features in the free version of GTmetrix before upgrading to the paid version to use more features. Monitoring, managing, and increasing the performance of the website will become fast and convenient.

You can also refer to other website speed checking tools to choose the one that best suits your requirements.

2. Is the score on GTmetrix important

With website visitors, they are only interested in their experience on the website. If the client has to wait too long to see the content and layout on the page, they will exit. Increasing bounce rate is a sign that your website is not performing effectively.

Paying attention to the website scores on GTmetrix is a method of increasing customer experience on the page.

Your high score shows that your website is doing very well. If your score is low, you should optimize your website by discarding some large files, installing website speed optimization extensions or using website speed optimization services. Software and services to optimize website speed will help the website operate much better without wasting time and effort.

In some cases, the website score on GTmetrix is low, but the website still loads fast. Don’t worry! This is because the scores are calculated mostly based on frond-end. There will be backend factors that affect the speed of your website like hosting, scaling features.

Recently, GTmetrix has updated some more professional and effective changes.

So, see how GTmetrix tests your website speed!

3. Website speed test GTmetrix

To get started, go to the GTmetrix homepage and enter whatever website URL you want to test.



Click on “Analyze”, the website index will appear as below image: 


Note: GTmetrix allows the analysis option, including URL test location, device, connection, video, … To use this feature, you need to create and login account before performing testing. Investigation.

Step 1: Check GTmetrix Grade

GTmetrix Grade reflects the customer experience on your website through Performance score and Structure:

  • Performance score: This shows you how well your website is performing from a visitor’s perspective. The low-performance score level is 0 and the highest is 100. The performance score of over 75% is an optimized website.
  • Structure: Reflects how well your website is built for optimal performance. If your performance score is lower than 50%, you need to improve your website.

Step 2: Check Web vitals

Web Vitals provides key metrics that impact your website’s performance.

  • LCP: measure how long the element with the largest content is fully displayed on a customer’s device. Best LCP is 1.2s or less
  • TBT: time is blocked by the script during the load spread. TBT should be less than 150 mls
  • CLS: The degree of layout changes your customers’ experience when your page loads. Best CLS score of 0.1s or less. 

If your website score is satisfactory, it shows that your website is performing well. 

Step 3: Check out the website scores in detail

  • Tag Summary

The new updated version of GTmetrix provides Speed Visualization rendering. You can track how long the first element of your website shows up on your client’s browser.

Speed -Visualization           
Scroll down to the bottom, GTmetrix will point out the top issues you need to check back on your website.

Clicking on the issue will bring up an assessment and general instructions. You can rely on GTmetrix’s guidelines to come up with ways to improve your website.

The final section of the Summary tag contains analysis of Page Details (page size, page request, bytes) and tips for optimizing your website.

  • Tag Performance

This section displays reports on detailed metrics of website performance score and browsing time. The impact level of performance indicators is shown in color coding (green, light green, orange, red). Green indicates your website is performing well, and red indicates that you need to reconsider improving it.


  • Tag Structure

Similar to the performance tag, website structure metrics are also shown through color-coding. The worst performance indicator will be displayed at the top. In this section, GTmetrix also gives you best practices for improving website performance.

These are important data you need to care about when testing website speed with GTmetrix. You can refer to some other website data by clicking on Waterfall Chart, Page Load Video, Report History. These indicators will give you a detailed view to improving your website speed. 

Above are our experiences when website speed tests GTmetrix. If your website is having problems or too slow, please comment below or post your problem Magepow contact, our technicians will assist you.

See our articles for more useful information for your project!