A theme is a pre-made design for your website. This video demonstrates how to find a quality theme while avoiding poorly coded themes.
Many breathtaking WordPress themes are 100 percent free. The theme for this site (myboringchannel.net) is free. It’s called Graphy. The theme for my other website is also free and it’s called Stargazer.
On the other hand, if you need specific features, or if you want theme-specific technical support, you should consider buying a theme from a reputable WordPress theme developer.
I prefer minimalist themes. Lightweight themes load faster and are simpler to learn. And it’s easier to put the focus where it belongs — on your message.