Fine-Tuning Gemma 3: A Step-by-Step Guide with Custom Q&A Dataset

Google's Gemma 3, an open-weight AI model released in March 2025, offers impressive performance comparable to proprietary large language models while being efficient on limited hardware. The model supports text-only and multimodal inputs, and includes four configurations from 1B to 27B parameters, designed to run on a single GPU. A guide details the process of fine-tuning Gemma 3 on a custom dataset from Trustpilot reviews, using tools like Bright Data for data scraping and Unsloth for efficient training. The fine-tuning process leverages LoRA technology to optimize memory usage, enabling domain-specific adaptations even on consumer-grade devices. The refined model can interpret customer sentiment and provide actionable insights, with the entire process culminating in deployment on platforms like Hugging Face Hub. This approach highlights the model's adaptability for creating AI assistants tailored to specific industry needs, demonstrating an end-to-end workflow from data collection to model deployment.

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