Not all token identifiers will be touched in this lesson but only a few because this is meant to be more of an introduction to tokens. Tokens are actually strings of anything separated by something. To make it simpler, every word in this paragraph is a token. Those words are separated by a space. The space between each word is called the delimiter.
Tokens can be anything, words or group of words, or numbers.
And also delimiters can be anything, a single number, a comma, a dot, a space. But remember that a delimiter cannot be more than a single character. For the meantime, just remember the example above. Hopefully, that has given you a picture of what tokens are. Token identifiers are tools in scripting.