This is the 3019th most frequent Portuguese word.
wi
"Wi" is not a standard Portuguese word. It may be a proper noun, abbreviation, or slang.
In this sentence, 'Wi' is part of the term 'Wi-Fi', which refers to wireless networking technology.
Você conhece o termo 'Wi-Fi'?
Do you know the term 'Wi-Fi'?
Here, 'Wi' is again used within 'Wi-Fi', referring to the wireless internet connection signal.
O sinal de Wi-Fi está forte hoje.
The Wi-Fi signal is strong today.
In this context, 'Wi-Fi' encompasses the idea of connectivity provided by the wireless network, with 'Wi' as part of the terminology.