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you need to rank different sites and divert traffic on your main website.

use qoura to generate traffic on your website

Relevant links are more important

For testing software whitebox is used so that it won't affect the computer.

Crawl is something when robots visits your website, indexing is when your sites shows in serp.

submit your website on relevant blogs and submission websites.

post blogs in niche related website also do press release to increase the authority.

organic or in google ads?

Serp is result pages which shows all the results.

It takes 3 months to notice backlinks.

Stuffing keywords with in every possible way to manipulate your rankings .

what is 3:2 ratio?

in 2019 , NO bookmarking is dead in 2016 now only quality links matters.

breadcrumbs are used for navigation in website.

Web 2.0 means blog sites such as blogger , blogspot , wordpress.

You didn't mentioned kwfinder it also helps to find the difficulty.

Broken Link is changing the existing links on high da website .

Metrics such as increasing DA of website

Pbn are networks of website that are used to rank your tier 1 website.

you can add your site in robots.txt or add no index tag on the page.

robots.txt instruct robots to skip certain pages for getting indexed.

seo is important to rank your website. and get organic traffic.

after https/ssl update your site should have ssl without ssl google will display your site has deceptive.

links which we get from content is known as contextual link.

if the no follow link is from site which is relevant and diverts good amount of traffic. it is beneficial.