how PR websites helpful in SEO link building?

Hi friends,
PageRank (PR) is an algorithm, created by Google, that is used to determine the ranking position of any website. Scored on a scale of zero to 10, PR is used to measure the importance and relevance of a single webpage.

Although PR is not the sole ranking factor, it is used heavily to define where a single website will rank for primary keywords in SERPs. Backlinks given from high PR sites pass more credit through to your own.

Search engines use backlinks as a way to pass reputation through a range of websites. This means backlink profiles containing links from high PR sites could experience the same authoritative stance and reputation of the linking site.

4 Unconventional Ways to Gain Backlinks from High PR Sites
1. Guest Blogging
2. Surveys
3. Opinion-led Articles
4. Round-up Posts

It allows their sites to get a boost in the SERPs and provides a new way to get more traffic back to their site.