Has anybody got lucky with Adwords in a niche that has most of traffic from mobile devices?

If yes, then share some tips and tracks.

I have an online course to sale. So, I have built organically an email list which is around 20k subscribers. And I have been sending emails to the list. Since then I have send emails to almost half of the subscribers in the list. But still no sales, plenty of of click throughs but no sale. What to do now?

Should I consider installing w3 Total Cache installing to our wordpress site in order ease up the speed?

Are the Meta Description still important? Should we consider adding them to all of our pages.

Facebook or Twitter, who will win in order to get a content viral and make a good exposure to its audience. Answer with valid reasons please.

Its really embarrassing. We are promoting our product through banner ads by A PPV campaign. So, far we have got 2500 impressions over the banner and only 30 clicks from it which has not converted a single time. What to do next? Am I doing something wrong?

I order to learn and get jobs in the field of content copywriting I have become a mess. I have subscribed to hundreds of different blogs such as kissmetrics or quicksprout. I have subscribed to many paid newsletters and I have been doing this for several months.

But still after I am reading and studying all these methods and tricks still I know I am learning nothing. I need a definite procedure or step by step guide on learning copywriting. If somebody can help me on this, I will be greatful.

What should we keep in mind while adding App to a App Store?

Recently, I have developed two landing pages for your site. Which has same layout but different page description opening style. I want to see which landing page does the best against bounce rate. So which tool to use?

Recently I got accepted in a CPA network. And also I am following many influencers and marketers in order to get some knowledge. Most of them has suggested me to choose a PPV network to promote my affiliate products. I have a budget under $1000. So which network will be best for me?