Yes, the theory says that page speed is very important for the ranking of any website, but in practice, I see many top ranking sites with a page speed... even below 50! Sometimes it's a bit complicated to understand Google 
Latest posts made by dinerobits
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RE: Is page speed important to improve SEO ranking?posted in On-Page Optimization
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RE: What are the best SEO plugins for WordPress?posted in Local Website Optimization
Below are some of the best SEO plugins for WordPress for me:
WP Rocket
Redirection
Complianz
Yoast SEO
Pretty Links