How to identify PBN Links and Normal Links?

You won't be able to identify a PBN if it's a real PBN.

Rest all links are either link farms (low quality) or they are normal links (high quality ones).

Generally, most PBNs or Link Farms will be easily identified through having posts covering a wide variety of unrelated niches (eg a post about crypto, followed by a post about the best juicer, followed by a post about the best web hosting), or through having a very small amount of content, all of which appears on the homepage.

By utilizing the metrics and traffic of a website, you can easily discern whether it is a PBN or a site of authority. A website with good and decent metrics and traffic is likely an authority, while a PBN typically has no traffic.

PBN links are links from private blog networks and are often easily identifiable due to the similar domain names and content. Normal links are more diverse and are usually from reputable websites.