This is the 1722nd most frequent Spanish word.
algo
"Algo" means "something" in English.
In this sentence, 'algo' is used as an indefinite pronoun indicating 'something' or 'an unspecified thing.'
Tengo algo importante que decirte.
I have something important to tell you.
Here 'algo' functions as an indefinite pronoun referring to 'something' often used in offering or suggesting scenarios.
¿Quieres comer algo?
Would you like to eat something?
'Algo' is used to signify 'some' or 'a certain amount' of something, reflecting partial agreement or possession of a quality.