On the 1688 platform, new products and optimization are mainly carried out through the following windows:

1. **Alibaba International Station Backstage**: Log in to the Alibaba International Station Backstage, you can find the product management page, through which you can add, edit, and remove products.

2. **Taobao Seller Center**: If you also have a store on the Taobao platform, you can add new products and optimize them through the Taobao Seller Center. The Taobao Seller Center provides a wealth of tools and data support to help sellers better manage products and optimize store operations.

3. **1688 Seller Center**: Log in to the 1688 Seller Center, you can find the product management module, through which you can add, edit, and remove products. At the same time, the 1688 Seller Center also provides product optimization tools and data analysis to help sellers increase product exposure and sales.

4. **Alibaba Market Trend**: Through Alibaba Market Trend Tool, you can understand the hot spots and trends of the market, so as to optimize products and develop new products.

5. **1688 Platform Search**: Enter keywords in the search bar of the 1688 platform to find the details and market feedback of related products, so as to optimize products.

It should be noted that no matter which window is used to add new products and optimize products, it is necessary to ensure that the product information is accurate and detailed, and complies with the relevant rules and requirements of the 1688 platform. At the same time, when optimizing products, pay attention to the details of various aspects such as title, description, picture, price, etc., to increase the exposure and sales of products.