The phrasal verb "spend on" is predominantly used in both informal and formal contexts, often with little variation in its connotation across these different levels of speech. It functions generally to describe the allocation of resources, particularly money, towards a specific purpose or item. For instance, one might say, "I spend a lot on groceries," or in a more formal report, "The company spends considerable resources on research and development." This phrasal verb is versatile, appearing frequently in both spoken and written forms, and is particularly common in discussions about budgeting, finance, and personal or organizational expenditure. Its usage is straightforward, though context can subtly alter its perception, such as suggesting frugality or extravagance based on the amount spent or the item or service it is spent on.