Keyword research is a constant process. Trends change. Seasons change. Popular terms and catch-phrases change. SEO and marketing agencies are a great resource for ensuring that keyword research is done on a regular basis. You should refresh your research at least quarterly, ideally monthly, to stay ahead of your competitors. Partnering with a reputable SEO agency is a great way to ensure you’re always ahead of your competition.
Hey Alex – this is a good question. No tool is going to be spot on. My advice is to not look too much into the accuracy of the metrics, but look at it more as a relative measure. I’m finding Ahrefs to be a good barometer for keyword competitiveness, but I’ve also heard great things about KW Finder lately. I think it’ll more come to personal preference. Both are solid options.