好些 is a quantifier used before nouns or as a pronoun to mean 'quite a few' or 'a good many'. It typically modifies nouns (好些人 'quite a few people') or stands alone when the noun is understood (好些年没见 'haven't seen each other for quite a few years'). It implies a large but indefinite quantity, and is often used in casual and written contexts. Do not confuse with the adjective phrase 好些 (hǎo xiē) meaning 'much better' — the quantifier is pronounced identically but functions differently.