Are there any specific book on Content Marketing that you guys follow?

I have got two domains in hand. One is very aged and other one is new. The new one is keyword based so it will generate some easy traffic. So, here lies the dilemma which one should I choose. Does the aged one has upper hand in SEO?

What do you guys think of authority? I mean when people say that a blog is of high authority in its niche.

Note:- I am not talking about Domain Authority or DA here.

What's your say about PBN's? I know many will say that its a black hat techniques so avoid it. But frankly speaking what do you think of it?

What is rel=”noopener” tag?

What was the first search engine?

Which forum script has blog in them by default? I am talking about both free and paid.

We have a tech blog which is 3 years old. Back then when we started it. It was getting 400-500 visitors per day. We have published new content since then but haven't much cared about the traffic. Now the blog is getting almost 100 visitors per day. What can we do to recover the lost traffic?

The blog has almost 6k backlinks referring from almost 90 domains.

What are the best practices for Link Building in 2019?

Are the RSS feeds loosing their importance?