What Is Correct? Idea’s or Ideas?
As a general rule, we never use an apostrophe (that’s this little sign here ‘) when forming the plural of a noun.
Let’s take the word ‘idea’. All you need to do is to add an ‘s’ on to the word—to form ‘ideas’. Believe me, you don’t need an apostrophe!
However, there are a few exceptions. Why not take a look at this article here?
I hope that helps!