Lessons

Introduction
• Search engine optimization
  • Broken links
    Missing CSS files Missing images Missing JavaScript files Broken links Beautiful page 404
  • Site map
    The content of the site map The site map file
  • Micro-markup
    Using markup Validation microresonator Yandex and Google
  • Robots.txt
    Content robots.txt Errors in Robots.txt
  • References
    Cyclic links The "title" attribute of links Link to the main page CNC link format Link format
  • Text
    Text formatting Grammatical errors in the title Interface spelling
  • Duplicates
    Duplicate "title" Duplicate "description"
  • Basic
    Headings H1-H6 The "description" meta tag Title tag hreflang tag Canonical tag Title Title Brand name in title
  • Pictures
    Images have the "alt" attribute. Human-understandable name of the picture
• Speed
  • Minification
    CSS minification Minification of JavaScript files Minification of inline CSS code Minification of images without loss of quality Minification of JavaScript files Unused CSS code Data optimization:Image URLs Format of animated images Unused JavaScript code Using WebP Image compression is missing Video bitrate
  • Reducing requests
    An overabundance of small pictures Ungrouped CSS files Ungrouped JavaScript files An overabundance of fonts Availability of end-to-end CSS, JS files The presence of a monochrome font Uploading duplicate files Using JS facades Redirecting JavaScript code Adding lazy loading Redirect from/to www version
  • Fonts
    Specifying default fonts Font Optimization An overabundance of monochrome icons
  • Loading time
    Page HTML code size HTML code generation time Total weight of images Total loading time Total page load time. Display time of the first graphic Server response time delay Server response time under load Blocking files
  • Server Settings
    304 response code for caching ETag header The "Expires" header GZip compression Title "Keep alive" Redirects Using HTTP2
  • Pictures
    The original and displayed size of the images Using sprite technology Recompressed images Cropping Images
  • The first content
    The sequence of connecting JavaScript files Font display mode Preliminary connection Removing lazy loading Long JavaScript Premature file upload Matching language and hosting Blocking requests to another country
• Mobility
  • Screen support
    Adapting the layout to a computer monitor Adapting the layout for the tablet Adapting the layout for the phone Screenshots for the mini report Broken layout
  • Comfort
    Finger friendly
• Bugs
  • Code
    JavaScript error messages HTML Validation Validation of CSS code Video Player
  • Availability
    AAAA DNS server record IPv6 connection
  • Server
    HTTP Headers Erroneous extension of images Corrupted files Correct Mime Type of the file
• Convenience
  • Social networks
    Snippets of social networks and instant messengers
  • Web Application Manifest
    Validation of Manifest.json
  • Favicons
    Breakdown into HTML5 sections List of scanned links Large favicon The BrowserConfig favicon Apple touch bar icon Favicon.ico file
  • Mail
    SPF DNS server record DMARK DNS server record MX record of the DNS server Reverse DNS record
  • Basic
    Links for phone numbers Links for Email addresses Background flickering on hover Interface responsiveness Annoying messages Images that jump while loading
  • Text readability
    Sufficient text contrast Readable text size Line spacing in the text The size of the text in the pictures
• Security
  • Encrypted connection
    Encrypted IPv6 connection SSL certificate validity HTTPS Availability Redirects to protected
  • Exploits
    Secure file upload CSFR form protection The "Strict HTTPS" header Using Java Private access to service files Enabled error display in the north HTTP headers for security
  • Vulnerabilities
    Vulnerable JavaScript code Vulnerable JavaScript library Antiviruses SSL vulnerabilities