This is the 399th most frequent Slovenian word.
veliko
"Veliko" means "a lot" or "many" in English.
'Veliko' is used as an adverb indicating a considerable quantity associated with 'zanimivosti' (attractions).
To mesto ima veliko zanimivosti.
This city has many attractions.
Here, 'veliko' functions as an adverb meaning 'a lot' or 'many', describing the quantity of 'ljudi' (people).
Veliko ljudi je prišlo na koncert.
A lot of people came to the concert.
In this sentence, 'veliko' again acts as an adverb expressing a great quantity, this time referring to 'uspeha' (success).