Remove ads: As you know, on free plans your website builder will advertise on your site. Whether this is through a subtle banner or an annoying pop-up, this can ruin your professional image if you’re promoting your own brand or running a business. On paid plans, such as Wix’s Combo plan, these adverts are removed, leaving your website clear of any distractions. This is similar to using the free version of Spotify compared to having a Premium account – you can still listen to music on both, but on the free plan you’re interrupted with adverts!
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.