Short domains are the best .it is easy to remember and type, that helps users to find you.

Length of domain name

Arrow

Try to  Add Keywords, because Keywords can help to improve your SEO.

Use of keyword

Arrow

Make sure every one can type your domain without any confusions and easy To Pronounce.

Easy to type and Pronounce

Arrow
Arrow

Before conforming a domain name, always check if It’s not trademarked or already used

Take a research

Arrow

When you’re choosing your domain, think long-term because changing a domain name is costly, and it  will affect your site's SEO ranking.

Think Long-Term

Arrow

Once you select your domain, you should register it as soon as possible, so it will ensure your domain name is in your hand

Be quick

Arrow

The most familiar and easiest to remember domain extension is “.com” so if choosing a domain name extension give first priority to “.com”.

Domain Name Extensions

Arrow

Read More About  How to choose a Domain name