A Good SEO Service for Article Site?

Hey,

I've got an article site that I've been running for the last couple of months. I've managed to get some rankings for some of my articles like on the 4th 5th and 6th page of Google. What i wanted to do is to use an SEO service that could help boost up these pages that are already ranking in google search and hopefully get me in to a better position. As there are so many services to choose from i don't know which one to purchase?

Any help would be greatly appreciated

You can try to get some high authority link juice using editorial sites. With this, there is a high chance for your keyword to move further.

These links are always considered to be healthy, so you can count it for long-term.