How to increase Customer retention?

Do you think that for branding purposes mobile marketing and mobile optimized sites are utmostly necessary?

Hello friends-How to visible website in google search results? This is website domain <!-- m --><a class="postlink" href="http://www.skypesupporthelp.com">http://www.skypesupporthelp.com</a><!-- m -->. It is visible ramaining search engine results like- bing, yahho, yendex but still not visible in google. It has up to 3000 backlink, when we do search engine submission then its visible in google but after 1 to 2 days It is to be invisible in google, so please suggest me some authentic solution to fix it. thanks

How to visible website in google search ? when we do search engine submission then its visible in google but after some day It is to be invisible in google, so please suggest me some solution to fix it

Email marketing

I see a plenty of sites which doesn't have a mobile version or not mobile optimized.

How much do you guys rely on data when it comes to getting sales?

Where to learn Affiliate Marketing? I am looking for good tutorials along with videos.

How many links to product pages from a site is good?

If I target two different countries with two versions of my blog then will it be termed as any violation to google guidelines?