Domain name is a website address, which is a reference to your server IP Address. There are a few reasons custom domain is best for your website.
Website domain creates a professional branding reflecting your business as well as the first assumption your visitor will see
Domain name offently written in a human readable form such as www.brand.com and easy to remember rather than using IP address
With a custom domain, your website looks more trustworthy and your customer will be more confident to get your products or services
Create unlimited professional email address represents each and every individual who are working in your company
Your website can have multiple sub-domains which can represents specific products or services that your business offering
Havings a unique DOMAIN will increase your website ranki in search engine portals such as Google, Yahoo, Bing and others