ESP32 with ESP 32 over Wifi comm

Hi ,
I want to use wifi in my application where two ESP32 wroom working as a client and server.

I just want to send strings in between them .so which examples should i use for this

This one uses the same 2.4GHz band, but not on WiFi it's direct 2-way communication:
ESP-NOW Two-Way Communication Between ESP32 Boards | Random Nerd Tutorials

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thanks for your suggestions to use ESP-NOW.
as per our application we only want to use Wifi.

Same site has an ESP32 web server tutorial and many others.