Think about what you do as a creator.
If you are an illustrator, then “illustrator” is a keyword from a content perspective. Are you a digital illustrator? Then, there you go, “digital illustrator” is another example. What is it that you do the most in illustration? Character design? Yes, another keyword.
These are all seed keywords or head terms, as they’re often mentioned, because these are essentially simple phrases that describe the given topic the best, in this case, something that you represent as a creator.
Then, there are the so-called long-tail keywords that are longer and more specific, with lower volumes (I’ll explain volume in a second) but with searchers behind them who are more likely to convert, i.e. buy something, than those using head terms. A long-tail keyword could be “digital illustrator for hire” or “character design ideas”.