Are there any best times to advertise on Amazon? 

Advertising on Amazon can be effective at any time, but certain times may be more beneficial than others, Here are a few factors to consider when determining the best time to advertise on Amazon:

Seasons and Holidays: Advertising during peak shopping times such as the holiday season or back-to-school season may result in higher sales and increased visibility for your products.

Product Category: Certain product categories may perform better at different times of the year.

Competitor Activity: Monitoring your competitors’ advertising activity can give you an idea of when they are most active, which can help you determine the best times to advertise your own products.

It really depends on product to product but in general the best time is to start from the Morning of USA time and stop campaigns before 10PM

It depends on your product and the category, you have to understand the customer’s behavior, suppose you sell products that are in the home & kitchen category, which will be more related to women (for ordering kitchen products or decorations), generally, the age would be around 30-50, so most of the time they will be active in the morning time so your best bet would be the morning time for advertisement, however, if you sell gaming products, so they tend to stay wake at night, so your chances of getting sales would be higher at night, you have to check when you receive most of your orders to understand what is the best time for you to advertise.

It depends upon your product search volume and also on your product demand.

It varies depending on the product, sometimes it can produce good results at night and sometimes it can produce good results during the day.