How to know a page is worth linking to?
See if the page is ranking for any search term or not. If ranking then how they are doing. Are there already any webpages referring to it or not.
The Domain authority, Page authority and search engine ranking can help us determining primarily that if a webpage is worth linking or not.
Check Domain Authority, Page Authority, Page Rank, year of created and year of expiry then you can link to that site!!