interjection
that's right; that is so; yes, it is
Polite response confirming what the other person said or asked. Often used as はい、そうです or ええ、そうです.
これは田中さんの本ですか。—はい、そうです。
Is this Tanaka's book? — Yes, that's right.
会議は三時からですね。—ええ、そうです。
The meeting starts at three, right? — Yes, that's right.
interjection
it seems so; that appears to be the case; that's my impression
Also used politely when agreeing based on appearance, impression, or available information rather than strong direct confirmation.
この道で駅に行けますか。—地図を見ると、そうです。
Can we get to the station by this road? — Looking at the map, it seems so.
expression
I hear that; people say that; it is said that
Hearsay pattern used after the plain form of a verb or adjective: 雨が降るそうです, 高いそうです, 便利だそうです. It reports information heard from another source.
明日は雨が降るそうです。
I hear it will rain tomorrow.
新しい店はとても人気があるそうです。
I hear the new shop is very popular.