Cart example:

Website: https://stubbornstudios.com/
password: 1234
Hi @Amin_5 that requires an advanced theme customization if a theme doesn’t already have a cart popup/toast.
Double check settings for not redirecting users to the cart-page there may be an option for a cart notification instead.
If you need this customization added to the theme then contact me for services paull.newton+shopifyforums@gmail.com .
Contact info in forum signature.
ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.