What is the function of css selector greater than sign & gt; and css selector greater than function?

What is the function of css selector greater than sign>?

What is the role of the css selector greater than the number>:
This topic describes the functions of the CSS selector. Due to browser support problems in the past, it is possible to use fewer selectors, but with the passage of time, version updates and compatibility are no longer a problem, so there are more applications, the following is a brief introduction to code instances.
This selector can match all the first-level child elements of a specified element.
Code example:

<! DOCTYPE html>  
The above Code meets our requirements. You can use the> selector to set the style of the first child element under the box element.
Therefore, the container div of the "ant tribe" string does not get the corresponding style settings.
 
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