How do we optimize a website for 3 different countries?

Do I want to know the things that should be taken into account when optimizing a single website with a .com domain in 3 different countries? Do we need to buy the domain extensions of the respective countries to which we are going?

You can use your country in your title. Because it is also a good factor to target any country.

The smartest thing is to organize web hosting in the countries where you are going to market. The latency of your website will be much lower.

good advice…

A good tip in the accompanying book, is actually an extra book. I think of "spin rewriter", but there are some interesting traffic concepts. In the google webmaster tools you can specify each store for the target country, but I'm not sure how effective this function is. ..

Some question in the category. my client has websites with different .com and .es languages ​​and .fr domain extension. The keywords for these are native. How can we proceed for this?

Are you going to persecute people who speak French and Spanish in the United States? If you are going to use .es and .fr domains, you should consider hosting them on a server in France and Spain.

You should create a separate page for each country and also add keywords relevant to the country, such as xyz australia.
on the last homepage for these 3 pages.

For different countries, you will also have to register as an Amazon affiliate in that country, at least that is how it works in France (where I live).