Signal from noise.
WHAT MATTERS MOST
Content that genuinely answers what someone searched for Being crawlable and indexable Site speed, particularly on mobile Mobile usability Links from other reputable sites Clear site structure
WHAT MATTERS SOMEWHAT
HTTPS
Structured data, which affects how results display more than ranking Internal linking Page titles and descriptions, which affect clicks more than position
WHAT MATTERS LITTLE OR NOT AT ALL
Keyword density Meta keywords, ignored for two decades The hosting plan you buy A dedicated IP address Free versus paid SSL certificates Submitting your site to hundreds of directories Exact-match domains
THE UNCOMFORTABLE PART
Most ranking difficulty is competitive rather than technical. If better resourced sites cover your topic thoroughly, technical optimisation will not overcome that.
The realistic path is finding queries where you can genuinely be the best answer, usually narrower and more local than you first assume.