This is the 11422nd most frequent Polish word.
internetowego
"Internetowego" means "internet" or "online" in the context of something related to the internet.
The word 'internetowego' functions as an adjective describing the noun 'sklepu' (store), indicating that the store operates online.
Zamówiłem nowy telefon z sklepu internetowego.
I ordered a new phone from the online store.
Here, 'internetowego' describes the noun 'kursu' (course), identifying that the course is conducted online.
Dzięki kursowi internetowego nauczyłem się programować.
Thanks to the online course, I learned to code.
In this sentence, 'internetowego' is used as an adjective modifying 'czasopisma' (magazines), referring to magazines that are available on the internet.