1. WordPress SEO by Yoast

WordPress SEO plugin

It is one of the most downloaded WordPress plugin of all times. Yoast’s WordPress SEO is a comprehensive solution for all your on-site SEO needs.

It allows you to add SEO title, meta description, and meta keywords to each post and page of your site.

You can also write custom title for your main site, archives, category and tag pages. It also adds Open Graph meta data, Twitter Cards, Sitemaps and ping search engines whenever you update your site.

2. SEMrush

SEMrush

SEMRush is a tool that Pros use to gather analytics and insights from their competitor’s to help improve their own SEO.

You can learn about organic keywords to rank for, places where you can get backlinks from, insights into your competitor’s advertising strategies, and so much more.

SEMrush is a paid subscription and is used by thousands of SEO professionals all over the world. It can provide you an enormous wealth of data.

3. Google Keyword Planner

Google Keyword Planner

No one on the planet has more insights into what people are searching for than the search giant Google.

Did you know that you can get your own keyword ideas from Google itself by using the Google Keyword Planner tool.

This free tool is offered to Google’s advertisers for free and anyone can use it. It’s main purpose is to show advertisers the keywords they can bid on for their advertising campaigns. It also helps advertisers choose right keywords by showing them an estimate of search volume, number of results, and difficulty level.

As a content marketer or blogger, you can use this data to find keywords with high search volume, high advertiser interest, and more importantly keywords where you can easily outrank all other sites.

4. KeywordTool.io

KeywordTool.io

Keyword Tool is one of the best free keyword research tool available right now. It allows you to simply generate keyword ideas by typing in a keyword. These keyword suggestions are gathered from Google’s auto suggest feature.

These keyword suggestions are a treasure of information. Google autocomplete suggest keywords based on how often a keyword is used for the search. This means that the top most results are the most frequently searched terms on Google for that particular keyword.

Keyword Tool is amazingly fast, and most importantly it is completely free for anyone to use. You can use it to optimize content on your WordPress site. It also allows you to get keyword suggestions from YouTube, Bing, and App Store as well.

5. Open Site Explorer

Open Site Explorer

Developed by Moz, this free tool allows you to check data for any domain name. You can see who is linking to that domain and what anchor texts they are using. Apart from that, Open Site Explorer offers a wealth of information like top pages, linking domains, which pages are linked on your site, etc.

This tool is free, but has daily search limits for each person.

To unlock the full power, you would need a Moz Pro Subscription which also gets you access to their other tools as well.

To read more click here.