What does "good to see ya" mean in this situation?
"Good to see ya" here has the same meaning as "it's good to see you". The only difference is in the pronunciation of "you". Emma Stone pronounces "you" as "ya" here which sounds more casual and informal than saying "you". "Ya" just represents the pronunciation of "you" in this way, which is an informal pronunciation and should not be used in more formal conversations. However pronouncing "you" like "ya" is common when greeting people in a causal situation, like when greeting a friend.