Unless you are a computer scientist with a PhD in statistics, eight years full time experience in SEO and worked at Google for 20 plus years you should probably use, and learn to use the Yoast SEO plugin.
Use the free version Yoast for at least a week of full time optimization.
(minimum 40 hours of optimization, not content creation, NOT uploading images, NOT PLAYING AROUND, REAL DEDICATED OPTIMIZATION)
Once you’ve learned about the Yoast dashboard and keywords plan on spending $75 per year on the premium version. PER YEAR. YES – EVERY – YEAR.
If you do not completely understand the settings and process in the free version, you are not ready for the premium version.
They promise support with the premium version, but considering that a good SEO engineer charges between $90 and $195 per hour, don’t count on general SEO help for the price of Yoast. But Yoast will help you to use Yoast. And every year of Yoast will make you closer to being a rocket scientist of SEOnesss.
You are a fool if you think you will soon be as smart as a surgeon, a rocket scientist, or a true engineer of SEOness. Unless you are a surgeon, in which case you are smart enough to be a surgeon. But even a surgeon might want to know enough to improve their SEO ranking for lap band surgery.
If you are considering any other SEO plugin, stop. If you read somewhere that you need other SEO plugins on top of Yoast, don’t fall for it. There are some very large and popular websites based on WordPress, and some use Yoast, but most don’t use any free SEO plugin. Those are the big players, you will need some help.
You will probably need a free SEO plugin. So start with Yoast, and stick with Yoast. There is no other SEO plugin that can be trusted.