Losing Kewords in USA why?

I have 3 months old website for the start all was perfect keywords are going up but before a monght and a half i started to losing keywords in USA but the kewords worldwide are growing. I one month i have dobuled my keywords worldwide esspecialy Europe with the same content ( no new created ) but i lost the keywords in USA. I have keywords in to 10 in Europe but no in USA. What can be the cause for this. Is it a penalty.
P.S before almost 2 months i made changes in all post titles.

Analyze your competitors, and unique content, and optimize it according to your USA keywords, you can start blogging and guest post, create relevant content and start social sharing.

It's maybe you competitor outranked you .
Regular competitor analysis and tracking you seo achievements are good preventive measures .

Changes in website
- If you are not properly handled , it can negatively impact the websites seo and affect the long term growth of the site .
- If done correctly, however redesigning a website can also increase your seo strength .

Regularly updated quality content can bring you to the top of organic search rankings .

Regularly updating your website, you can help prevent the security threats to your website , increase traffic , and conversion with updated content , and provide a user friendly experience using the latest web technologies such as responsive web design .

predator1988@ said:

I have 3 months old website for the start all was perfect keywords are going up but before a monght and a half i started to losing keywords in USA but the kewords worldwide are growing. I one month i have dobuled my keywords worldwide esspecialy Europe with the same content ( no new created ) but i lost the keywords in USA. I have keywords in to 10 in Europe but no in USA. What can be the cause for this. Is it a penalty.
P.S before almost 2 months i made changes in all post titles.

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I got the same situation here, 2 of my main ranking keywords were lost overnight with the Core Nov 18th update.

On the same hand, All the keywords which were lost on ENG results gained momentum on non-English sites.

Try searching the URL directly on Google US. See if it shows any results. Do the same for Non-English results.

US google is toughest to rank. Build a strong backlink profile.
With all things equal make sure you are using American English throughout the content and set the target country as usa in gsc.

It's not the freshest article but maybe can help you to find out what and why happens.
https://www.semrush.com/blog/guide-finding-keywords-ranked-lost-google-algorithm-update/