Which is more favourable to improve the keyword ranking on inorganic search result?

[uthra]

Which is more favourable to improve the keyword ranking on inorganic search result?

a) user friendly web design for search engine
b) unique and fresh content
c) Paid backlinks
d) Manual link building techniques

[jane18]

Except paid back links all other techniques are useful for improving keyword ranking in organic searches. Paid back links may harmful for a website ranking and your website may get penalty for it.

[Ezio]

Yes, Paid backlinks technique is bad for SEO after Google updates rolled out. Other techniques are good to increase your website ranking.

[davidweb09]

High Quality Unique Content posting & Manual link building techniques are best idea for it.