I have some questions about similar

For example Whale Rider (2003) id: 1088 genre: Drama, Family

The results are - "total_pages": 838 If you made request without puting page number

• 9/20 movies has popularity less then 1
• 13/20 movies has less then 5 votes
• some of then even hasn't genre Drama of Family It mostly unknown movies.

If i put page number situation is similar.

I read that similar is about: genre and keywords. What is the sort mode for similiar movies list? What movies are on first page when I didn't put page number? Thank you