On-Page SEO is evolving continuously. So here is a list of eight old-school On-Page SEO practices that can get your website penalized. So, make sure to avoid these old-school On-Page SEO practices to protect your website from the penalty.
1) Keyword Stuffing
2) Only Optimizing for Desktop, Not Mobile
3) Targeting Keywords for Traffic, Not Intent
4) Unnatural Way of Internal Linking
5) Using Unique Pages for Every Keyword Variation.
6) Spammy Footers
8) Content Swapping