These services can host your content on their servers free of charge, but in exchange for that zero cost, your online destination will have a less-than-elegant domain, such as jeffreylwilson.tumblr.com. That might be fine for a personal blog, but it will look too low-rent for a business that wants people to trust it enough to pay for whatever it's selling.
If you prefer a more traditional URL, you'll need to purchase one from the likes of GoDaddy or Namecheap. Domain name pricing can range from extremely cheap to extremely expensive, depending on whether or not domain squatters are looking to flip a valuable piece of online real estate. You'll want to get something short but evocative and catchy, and depending on what you do, you may find that many of your first choices are taken by either other legit domains, or by squatters who've scooped up the names as an investment. For more, please read How to Register a Domain Name.
This is a massive plus of website builders compared to web developers. A web developer can cost between $300 and $1,000 for template customization alone, and a fully customized website built from scratch will often amount to thousands. Making your own website using a builder, meanwhile, allows you to get a fully functioning website up and running for less than the price of a coffee.
How To Create An eCommerce Website With Wordpress 2020 -ONLINE STORE- (Easy For Beginners)