Was ist der Unterschied zwischen Das und Dass ?Du kannst auch einfach Beispielsätze geben.

das:
1) definite article, like "the" in English
e.g.
Das Haus ist groß.
2) demonstrative pronoun, like "that" in English
e.g.
Das ist verboten!

dass:
Conjunction, usually at the beginning of a subordinate clause, but can be used in other ways, too - I find it too complicated and cumbersome to explain all of them and would have to look them up anyway to not forget any, so I'm only giving you this "main" use of "dass".
As a conjunction, you would often translate it with "that" as well, but it's not a demonstrative "that", but the kind which introduces a subordinate clause/idea, e.g.
"Ich weiß, dass heute Sonntag ist." = I know that it's Sunday today.
"Es ist normal, dass man eine Fremdsprache üben muss." = It's normal that you have to practice a foreign language.
If you want to know all the uses of "dass", I would like to refer you to the Duden definition:
https://www.duden.de/rechtschreibung/dass