What is the correct tag link?

Question

Search Engine Optimization

For example, the “how to do it” tag, the link of which will be /tag/how%20%20to do - will such a link be correct and will it be normally perceived by search engines?
Or is it better to do /tag/how-to-do it ?

Answer 1

Better option 2

Answer 2

Уверен это не принципиально, но я бы делал как в Википедии, с нижним подчёркиванием.