This is the 4724th most frequent Japanese word.
有
"有" means "exist," "have," or "possess."
Here, '有' is part of the word '有名な' (yūmeina), which means 'famous.' It is used to indicate possession of fame.
私は有名な歌手を見ました。
I saw a famous singer.
In this sentence, '有' is used within '有益な' (yūekina), meaning 'useful' or 'beneficial,' describing information as advantageous.
この会社には有益な情報があります。
This company has useful information.
Here, '有' is part of the word 'あります' (arimasu), indirectly originating from '有る', which means 'to have' or 'possess,' indicating existence or possession of the garden.