Through Train is a promotion tool under Alibaba that helps merchants increase the exposure and click-through rate of their products on e-commerce platforms such as Taobao and Tmall. Positioning refers to the promotion position set in the Through Train. Different positions will affect the display effect and click-through rate of products in search results.

The following is a general description of how to position in the Through Train Standard Plan:

1. **Bidding ranking**: The positioning in the Through Train Standard Plan is determined by bidding ranking. Merchants can set the bid for each keyword. When users search for related keywords, products with high bids have a greater chance of getting a better display position in the search results.

2. **Bidding strategy**: Merchants can formulate different bidding strategies based on their promotion needs and budget. Generally speaking, the higher the bid, the higher the display position of the product in the search results, and the click-through rate will also increase accordingly.

3. **Keyword selection**: When positioning, merchants need to choose appropriate keywords for promotion. Choosing keywords that are highly relevant to the product and have moderate competition will help increase the exposure and click-through rate of the product in the search results.

4. **Quality score**: In addition to paid ranking, the Through Train will also consider the quality score of the product. High-quality product information, high conversion rate and good user experience will all affect the display position of the product in the search results.

5. **Monitor and adjust**: Once the position and bid are set, merchants need to continuously monitor the promotion effect and adjust it according to the actual situation. According to data such as click-through rate and conversion rate, adjust bids and keyword selection in time to obtain better promotion results.

In general, the position of the Through Train standard plan is determined by paid ranking. Merchants need to formulate bidding strategies and select keywords according to their own situation, and continuously monitor and adjust promotion strategies to increase product exposure and click-through rate.