Lessons
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Introduction
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SEO
- Broken links
- Site map
- Semantic markup
- Robots.txt
- References
- Text
- Duplicates
- Basic
- Pictures
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Speed
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Minification
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Minification of CSS to reduce its volume
Minification of the embedded JavaScript code of the page
Minification of the embedded CSS code of the page
Minification of images without loss of quality
Minification of JavaScript files to reduce its volume
Unused CSS code
Data optimization:Image URLs
Animated image format MP4, WEBM, SVG instead of GIF and WEBP
Unused JavaScript code
Using the WebP format in images
Too high-quality images without using compression
Suitable video bitrate
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Reducing requests
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An overabundance of small pictures
Grouping CSS files
Grouping JavaScript files
An overabundance of font files
Availability of end-to-end CSS, JS files
The presence of a monochrome font
Uploading duplicate files
Using JavaScript facades
Redirecting JavaScript code
Adding lazy loading
Redirect from/to www version
- Fonts
- Loading time
- Server Settings
- Pictures
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The first content
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The sequence of connecting JavaScript files
Font display mode
Setting up a pre-connection
Removing lazy loading
Long JavaScript code execution time
File upload delayed or on demand
The server is located in the same country where the users of the site live
No requests to another country that cause page loading to be blocked
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Minification
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Mobility
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Screen support
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Adapting the layout to a Full HD computer monitor
Adapting the layout for a horizontal tablet
Adapting the layout for a horizontal phone
Screenshots for the mini-report
How blocks break the page layout
Adapting the layout to an HD computer monitor
Adapting the layout for a vertical tablet
Adapting the layout for a vertical phone
- Comfort
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Screen support
- Bugs
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Convenience
- Social networks
- Web Application Manifest
- Favicons
- Basic
- Text readability
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Vulnerabilities
- Encrypted connection
- Exploits
- Vulnerabilities
Display time of the first graphic
The user decides to stay on the site or leave within the first 15 seconds after opening the page. Therefore, it is important to show at least some content as early as possible, without waiting for the final page load.
If this is a landing page, then it is important to show the user the first screen where the USP of the site is formulated. If this is an online store catalog page, then you need to display a panel with filters and the number of pages so that the user can estimate the width and depth of the product range. If this is a blog page, then you need to display the title, the first paragraph, the table of contents or the first picture that sets the tone for the entire material.
You have only 15 seconds to get the user interested. By speeding up the display time of the first content by 1 second, you will give the user 6.5% more time to analyze your site. This greatly increases the likelihood that you will be able to interest the user and he will continue to explore the site.