Hi Louis,
I am a Senior Inbound Marketing Consultant at HubSpot.
HubSpot is a very powerful marketing automation platform, made up of lots of different tools, like the keyword app you’re referring to.
The HubSpot keyword tool specifically is a great piece of marketing software that can help you plan and organize a strategy to help you rank for specific keywords, but by no means should you be under the impression that it can do the work for you.
Whether or not you get rid of unwanted links on Google is entirely dependent upon you, but HubSpot has all of the tools and analytics to make it easier.
Hope that helps and happy to answer any follow up questions.
Thanks,
-Jon
