According to Shopee's official brand usage specifications, it is generally not recommended to use Shopee's official logo in the main image of a PPT without authorization. Brand logos are usually protected by copyright and require permission from the brand owner to use. If you want to use Shopee's official logo in your PPT, it is recommended that you contact Shopee to learn about their brand usage policy and obtain their authorization or guidance. This ensures that your use complies with brand specifications and avoids copyright infringement issues.