ما هي المشكلة التي حلها سولانا؟

Could you elaborate on the issue that Solana addresses? I'm quite intrigued to understand the specific challenge it aims to overcome in the realm of cryptocurrency and finance. Could you perhaps outline its unique approach to resolving this problem and how it differs from other solutions available in the market? I'm keen to grasp the significance of Solana's contribution to the industry and its potential impact on the future of blockchain technology.