I purchased a domain and used it to build for fun a website for a school dance. Now I removed it and replaced it with my actual website with a totally different topic (piano lessons). While looking on Google search results with site:pianogenius.it I still see some pages of the old website (that doesn't exist any longer) indexed that lead to 404 Is that bad for SEO? Should I purchase a new domain, or is just a matter of time that Google will forget the old pages and will index the new ones (that hasn't already done)?
School dance and piano lessons are two totally different poles. I'm not sure how you related the two as same.
However, if your domain has the word piano in it, it's okay to create a website around piano lessons as you have already mentioned.
Regarding the indexed links, you can resubmit the new sitemap in Google search console and inform the search engine about it. This way, your previously indexed pages will be deindexed in a day or two.
Hope this helps.
Answered 4 years ago
Access 20,000+ Startup Experts, 650+ masterclass videos, 1,000+ in-depth guides, and all the software tools you need to launch and grow quickly.
Already a member? Sign in