CSS after and CSS before example

How to create css after and before example?

We can add content in any element using with CSS after. If we required that add as Plus sign after any heading text then we use CSS After and if require adding any content or icon before the text we use CSS before property as in the example below:

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What is mean after css

What is mean before css

How to call image with before css?

Image example first technique.

How to call image with after css?

Image example second technique.