Here are a few tools we use for our keyword research:
SEO quake (Browser plugin): We have it on at the bottom of my browser windows all the time. It shows me stats for every page on the internet.
Google Keep: We use Google Keep, but you can use any app that helps you keep a track of appointments, ideas and tasks all in one place.
Majestic SEO: This tool tracks our websites and shows us which keywords our website is getting traffic for. Competitor research tools help track our competitor’s website and keywords.
