Please can you tell me what is the right style of title 1- SEO Pakistan Search Engine Optimization Pakistan 2- SEO Pakistan, Search Engine Optimization Pakistan 3- SEO Pakistan | Search Engine Optimization Pakistan 4- SEO Pakistan - Search Engine Optimization Pakistan
add the adsence code to the middle of each article , now you have put this code in places which is very difficult for someone to read them and click them
All of the above are fine as the <title> element. However I would suggest separating the phrases (i.e. #2-4) from a usability/readability perspective. Most search engines likely normalize the <title> by replacing all punctuation with spaces before evaluating them for keywords anyway, so all 4 will likely be seen as if they were #1. You can see evidence that this is the case in Google Webmaster tools where Google shows you the anchor text they are seeing in your URLs inbound links. For example, if people link to you with the anchor text of "http://example.com/index.html" Google actually sees this as a link text of "http example com index html". Since Google and most search engines definitely treat hyphens as a word separator, I prefer to use hyphens to separate keyword phrases in my <title> elements.
These type of 4 methods is not a matter. But, you will decide how is your site is needful. I suggest 3 and 4
This is a personal choice, it hardly matters as long as those keywords are there But i personally like this SEO Pakistan | Search Engine Optimization Pakistan