Okay kiddo, let me explain what a 'dagger mark' means.
Have you ever read a book or a newspaper and noticed a little symbol that looks like a cross or a plus sign, but with longer lines? That is called a dagger, and it's used in writing to show that something is extra important or needs extra attention.
The dagger mark is used to show footnotes in a document or a book. Footnotes are little pieces of information at the bottom of a page that explain things or give more details, and the dagger mark helps readers know where to look for those footnotes.
For example, if you’re reading a book, you might see a sentence that says "The capital of New York is Albany" and then you see that there's a dagger mark at the end of the sentence. That means there's a little note at the bottom of the page that has extra information about Albany, like how it became the capital or what the city is known for.
So, the dagger mark is just a little symbol that helps writers and readers know where to find more information about something they're reading.