What are the reasons for increase in Excluded Pages in Search Console?

[makoo]

Hey Guys,
Can you please tell me what is the reason for the increase in Excluded Pages in Google Search Console & how can I reduce it.

[Cyril30]

1. You have a robots.
2. Your site has a large number of duplicate pages, typically because it uses parameters to filter or sort a common collection
3. The URL redirects to another URL.