Not only does a page stuffed with keywords turn off your reader, it’s also detrimental for SEO, too. Most content experts agree that your keywords should only comprise 1-3% of each post. While it’s hard to monitor this yourself, this tool checks it for you to make sure you have the perfect balance of keywords to boost SEO without overwhelming your reader. Many internet experts have confirmed that keyword density of more than 5% can make your work appear to be spam, which is really bad for your SEO.