Marqtune is an embedding model training platform designed to enhance search systems by fine-tuning models based on semantic relevance and specific business ranking requirements using its Generalized Contrastive Learning (GCL) framework. Users can access Marqtune through Marqo Cloud, set up datasets, and fine-tune pre-trained models with multi-modal training datasets, including both text and images. The platform allows users to evaluate the performance of the fine-tuned model against a baseline, often demonstrating significant improvements in relevance and accuracy. Marqtune's UI provides a user-friendly interface for managing datasets, models, and evaluations, and supports the downloading of fine-tuned models for further use. The guide emphasizes the platform's ability to fine-tune various models, encouraging experimentation with training parameters to optimize performance for different use cases.