This is the 3544th most frequent Russian word.
сайты
Websites.
In this sentence, 'сайты' refers to websites, showcasing the word's meaning as places on the internet.
Я посещаю интересные сайты каждый день.
I visit interesting websites every day.
Here, 'сайтах' is the plural prepositional case of 'сайты', indicating specific locations (websites) on the internet where actions occur.
На некоторых сайтах можно получить полезную информацию.
On some websites, you can find useful information.
In this sentence, 'сайты' refers to websites collectively, in the plural form, emphasizing the creation or development purpose.