Can irrelevant links from Blogspot sites  hurt you?

What is the basic difference between Adchoices and Adsesne? I heard these two terms a lot. I know that Adsense is from Google. But when I search I see a lot of mentioning of Adchoices too. Is this the new name for Adsense or used by Adsesne for any special cases?

When I check my link profile in google webmasters tool. I see plenty of links which I don't know where they came from. I don't understand properly here. If I am not being attacked somehow then how these type of links are getting picked up by my site?

Can anybody explain it to me?!

What are the requirements of selling ads directly to the publishers? Is there any guidelines?

If you don't have enough money to start a blog then what you will do?

Looking for a cheap ESP for 2k subscribers.

Note:- I am not looking for a free one. But a reliable cheap one.

Any content marketing tips you guys wanna give to a newbie content writer?

Please share some tips and tricks.

Links from Blogger sites, does they offer any real value?

Hello friends,

What's the recent meta description length in Google SERP?

I was using blogspot. And moved my blog from it to wordpress. Now many urls are showing the 404 error. How to quickly find all of them and then deal with it?