The main steps for uploading products to an online store are as follows:

1. Select a platform: According to your needs and target market, select a suitable e-commerce platform, such as Taobao, JD.com, Doudian, Shopee, etc.

2. Register and log in: Register a merchant account on the corresponding platform and log in to the backend management system.

3. Create a product: After entering the backend, find the "Product Management" or "Product Creation" function and fill in the product information according to the prompts.

4. Select a category: Make sure to select the correct product category to avoid violations or deposit deductions. You can search for product keywords directly on the platform to find the correct product category.

5. Write a product title: The product title should be concise and clear, and contain core keywords to facilitate search engine inclusion and recommendation. At the same time, avoid using banned words.

6. Fill in product attributes: Completely fill in the product attributes, including those with and without. The more detailed the attributes are, the easier it is for the platform to identify and recommend them to relevant users.

7. Upload product pictures: Prepare product pictures, and try to choose clear and beautiful photos. Follow the platform's regulations and adjust the image size and format.

8. Set product prices and inventory: Set product prices reasonably, considering costs, competition and consumer demand. At the same time, fill in inventory information to avoid out-of-stock situations.

9. Product description and details: Write detailed product descriptions and details, including functions, uses, materials, after-sales services, etc., to attract consumers to buy.

10. Publish products: After completing the above information filling and uploading, click Publish Products and wait for the platform to review and approve.

11. Optimize products: According to sales and data analysis, continuously optimize product titles, prices, descriptions, etc. to increase exposure and conversion rates.

The above steps are for reference only, and actual operations may vary due to platform differences. It is recommended that before opening an online store, you should understand the relevant regulations and operating procedures of the platform in detail to ensure smooth upload of products.