Functions of various head meta tags in HTML5

H5 standard statement, using HTML5 doctype, case-insensitive

Standard lang attribute writing method

Declares the character encoding used in the document

Priority is given to using the latest version of IE and Chrome

Page description

Page keywords

Web page author

Search engine crawling

Add viewport for mobile devices

iOS device begin

Title added to the home screen (new in iOS 6)

Whether to enable WebApp full-screen mode and delete Apple’s default toolbar and menu bar

Add Smart App Advertising Banner Smart App Banner (iOS 6+ Safari)

Set the color of the Apple toolbar

Enable 360 browser’s extreme speed mode (webkit)

Prevent IE from using compatibility mode

Prevent Baidu from transcoding

Optimized for handheld devices, mainly for some old browsers that do not recognize viewports, such as BlackBerry

Microsoft’s old browser

uc forces vertical screen

QQ forces vertical screen

UC forces full screen

QQ forced full screen

UC application mode

QQ application mode

windows phone click without highlight

Set the page not to be cached