Putting information flow ads on Douyin requires certain steps.

Here are the general steps:

1. Register an account: First, you need to register an advertising account in the Douyin advertising background. If you haven't registered yet, you need to create a business account because personal accounts cannot place ads.

2. Prepare materials: Create advertising materials, including pictures, videos, or gifs. You need to make sure that the materials comply with Douyin's content policy and are attractive enough.

3. Set targeting: In the advertising background, you can choose the audience you want to target. This includes age, gender, region, interests and other options. This helps ensure that your ads are only shown to users with needs.

4. Set a budget: Set the budget you want to pay for advertising. You can set a daily or total budget and adjust it as needed.

5. Choose a placement: Douyin provides a variety of advertising placements, such as recommendation pages, follow pages, search results pages, etc. Choosing the right placement can help you reach your target users more effectively.

6. Create an ad: Create a new ad in the ad background, including ad creative, ad title, ad description, etc. You need to ensure that the ad content complies with Douyin's advertising policy.

7. Review and delivery: After completing the ad creation, submit the ad for review. After the review is passed, the ad will start to be delivered. You can view the ad delivery data, such as impressions, click-through rate, conversion rate, etc. through the ad background for optimization.

8. Analysis and optimization: During the delivery process, continue to pay attention to the advertising data and make adjustments as needed. For example, if the ad is not effective, you can adjust the targeting, budget, or ad creatives, etc. Through continuous optimization, you can improve the advertising effect and return on investment.

Please note that Douyin's advertising policy may change, so before running an ad, be sure to check the latest policies and requirements. If necessary, you can seek help from a professional advertising agency or Douyin advertising service provider.