What's the significance of Robots.txt file in a website?

I am terribly confused right now. A site on of ours was converting pretty well from mobile traffic. After its success I launched another site. But it has got no such luck with the mobile traffic. Why is this happening?

Hi friends- What Best Methods to Get Traffic to our Website(Technical support)? please suggest some authentic source to get traffic like leads as well as ranking also in Google search engineg and Bing search engine.

Hello friends...

i want to know how can we delete Google Review from google my business ??

What is Mobile addon?

Since the last couple of weeks. We are seeing pretty unexplained earnings in adsense. Such as some day it will have extremely low eCPM rates and some day it will have so high that we have to worry that Google may block our account. Are you guys seeing this too?

If one has to start as an affiliate marketer. Then which ad network will you guys suggest to start with?

What kind of CPA offers works best for Mobile? And I am not talking about any specific niche but the entire web.

I have a list of clients. But the list is a mixed list, I mean there plenty of new clients along with plenty of old clients. So, I can't just email them what I am doing or selling right now. What should I do?

How to increase trust of a sales page? A sales page that will truly look like customer friendly.