Please follow the below template, it will help us to help you!
I set up piHole, DNS server is working, I think.
I was looking to block a social media, for example twitter, so I 5-6 times went to the twitter web site and looked for the domain in the query list and blocked it.
I can't block the website, it keeps coming up.
Thanks for helping.
Edit: I noticed that it works on Windows and iOS, but not on my Android smartphone...