What is Page Rank or PR?

[Phuongcassiopeia]

DA, PA, I knows it. But What is Page Rank and How do I increase PR for my website. For example in my website: https://parkourspace.com/, my PR with keyword "best parkour shoes" is 3. So How to increase this rank well?
Thanks!

[sjoie73]

DA, PA, I knows it. But What is Page Rank and How do I increase PR for my website. For example in my website: https://weldingzilla.com/ , my PR with keyword "best parkour shoes" is 3. So How to increase this rank well?
Thanks!