Questions about the identification and evaluation of specific ingredients.
The ingredient-selection tag is for those looking to improve their "catch" when out picking ingredients, usually at the market. Questions about gauging the ripeness of a particular fruit or recognizing when a particular vegetable is still fresh are welcome topics in this tag.
This tag is not meant for general recipe-modification questions, i.e. "what can I add to X?" Those questions are likely to be closed, unless they focus on a very specific type of improvement. In that case you should a tag that describes the modification instead, e.g. color or nutrition.