Surfer SEO

Surfer SEO is an on-page optimization tool from the company of the same name, built to help content creators, bloggers, marketers and small business owners write articles that actually rank near the top of Google. It's designed so that even a beginner can use it, while still offering plenty of data for experienced SEO specialists.

It works simply: you enter the keyword you want to rank for, and Surfer analyzes dozens of the top results in that SERP. From them it calculates how long your text should be, how many headings and images it needs, and which specific terms and phrases to include. As you write, it scores your content in real time and shows what's still missing.