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Buying Backlinks
PBN
Link exchange
Spam commenting
excessive link building

you can start by posting some comic post and sharing funny gifs, do useful comments on others posts which helps you in getting up votes ultimately increases karma score

This term is mainly used to tell the quality of back link higher the DA/PA of a website it's link has more authority! so, SEO point of view it's best practise to have backlinks from authoritative...

Bounce rate varies from site to site

For an static blogging site under 30% is ideal
For an Dynamic e-commerce website under 50% is ideal

Google Tag Manager is a Container tag where you can place your google tags and other 3rd party tags to track your website and various parameters. it's easy to implement without compromising the site...

If you are getting the do- follow link form a niche website then it will definitely give results

There are other free tools like plagiarism checker tool, siteliner etc. they will tell you from which sources they are copied

It's an google ad-word term called Pay-per-click in which advertiser has to pay certain cost to google whenever a user click on your ad

In Google Analytics you can filter out the http and https url's in backlinks!

Digg out the reason which site elements takes time to load you can get there detailed report from the free tools like google page insights, GT metrix, Pindom and much more, the general issues of load...

If you increase the length of your published content and add some points then google treated your content as an updated content and give some ranking benefits.