Is PlayStation Network (PSN) free?

It is important to highlight the distinction between the PSN and PS Plus since one of them is a free service while the other requires a paid subscription.

August PlayStation Plus FREE games: Hit the links in PGA TOUR 2K23 and more

Free £10/$10 PSN credit is being given out by Sony to celebrate 10 years of Plus

PlayStation Plus Season of Play Kicked Off With Free PS Plus Multiplayer Weekend, Avatars and Stars Campaign

PlayStation Plus October FREE games: The Callisto Protocol, Weird West, and more

Is the PSN down? - Server Status

PlayStation Plus Celebration Kicks Off With Free PSN Avatars & Mobile/Desktop Wallpapers - PlayStation Universe

PlayStation Plus Collection game list: Every title for PS Plus subscribers on PS5

PlayStation Plus on PC review: Not exactly a premium service

PSA: August 2021 PlayStation Plus Free Games Are Now Available

PlayStation Plus discount code: get it before Sony's price increase

PS Plus/PS Now Card Conversion Rates (All Countries, so far) : r/PlayStationPlus

PSA: Sony Giving Away $10 Credit To Some PlayStation Plus Members - GameSpot