How to better promote the site

[Michelle01]

Hello everyone,
Our company is OURPCB (https://www.ourpcb.com/) and we specialize in online prototyping to meet the low cost, fast delivery, and easy order requirements of our customers all over the world.
How should I promote my website?

[Michelle01]

And our custom wiring machine, custom cable website http://www.customwiringloom.com/ , please give me some advice