I wouldn't say it's the trick to "good" SEO, more like the trick to "not bad" SEO.
Managing on-page technical factors (which is what a plugin can help you with) is primarily a matter of successfully missing your foot with hundreds of potential bullets.
Getting SEO to "good" still requires good content and link building.
Managing on-page technical factors (which is what a plugin can help you with) is primarily a matter of successfully missing your foot with hundreds of potential bullets.
Getting SEO to "good" still requires good content and link building.