You can fine-tune those categories to match your business. One option is to search for them in SEMrush's Market Explorer In-Market Audience Interests.
Find a new market for a website with Google Market Finder
First, it will introduce you to the most important markets. For Square, these are the US, Germany, and the UK. You’ll need to do more research if you’re looking to expand into Japan.
If you check the detailed research option, you'll get a much longer list of countries you could potentially operate in. the US as your home region, and you'll be left with Germany, the UK, Japan, France, and Australia.
When you take a look at the CPC results on Google, you will notice that they are relatively high for Japan. This means that initial market expansion in Japan could prove to be quite expensive. At the same time, a 1000 mobile database high CPC is a result of high competition , so this can tell you that the market also has many participants.
Estimate the size of a market with Google Market Finder
Google Market Finder is a great way to estimate the size of a market. However, keep in mind that you may need to adjust to different search engines. To do that, you'll need to use different market assessment tools as you look to expand internationally.
Here we are looking at Google data and the popularity of keywords that fall into defined categories. If the most popular search engine is different (like Yandex in Russia), you will need to take that into account when estimating the percentages.