Google Adwords Optimization for German Website

I'm struggling with my Google Adwords campaign for my German Shopify shop and need an expert's assistance. The main concern is that I'm experiencing low conversion rates, which is affecting my primary goal of increasing sales.

The ideal freelancer for this project should have:
- Proven experience with Google Adwords
- Ability to analyze and optimize landing pages
- Proficiency in keyword research and optimization
- Understanding of ad copy effectiveness
- Experience with e-commerce campaigns

Please check the website and suggest how you can help improve it.