Uncountable nouns and examples

Uncountable nouns are nouns that cannot be counted, such as water, money, and research. In the podcast, examples of uncountable nouns were provided, including travel, research, accommodation, baggage, money, and traffic. Uncountable nouns in English do not have a plural form and do not use articles 'a' or 'an'. However, we can use the phrase 'a piece of' to specify a quantity, like 'a piece of information' or 'two pieces of advice'.