Meaning of "I bought it with my own money"

Nae-Don-Nae-San

I bought it with my own money내돈내산#라이프스타일#SNS#경제/재테크#밈/유행어2010s Meme

The emphasis is on leaving honest reviews—not sponsored posts or advertisements—based on personal experience with products purchased with one’s own money

"I bought this Bluetooth speaker with my own money, and since I'm really happy with the sound quality and battery life, I've been using it ever since."