From my basic understanding (literally just setting up my home Internet) it turns one Ethernet from the router into like 20 different connections for each computer or device
Keep in mind that I literally have no experience and can only give you the Wikipedia but I can't make sense it except for laughing at the word 'GigaSwitch'
https://en.m.wikipedia.org/wiki/Network_switch
There's literally so much else they should do, google docs, sheets, drive, phones, maps, earth, calendar, play store, translate, etc.
Good work, continue please.