Do not lump all products into one campaign. If you sell both winter coats and rain jackets, separate them. They have different seasonal peaks. This allows you to increase bids on rain gear during April showers while pausing the winter coat ads.
Your competitors have already made the mistakes for you. You can use third-party competitive intelligence tools (like SEMrush, SpyFu, or SimilarWeb) to see their historical ad spend. how to determine seasonality in a new sem account
Before you spend a single dollar, you must steal data from the outside world. Seasonality is rarely unique to Google Ads; it is a function of human behavior. Do not lump all products into one campaign
Determining these trends before you have your own data requires a blend of external market research, competitor analysis, and advanced industry tools. 1. Leverage External Trend Data This allows you to increase bids on rain
Google Ads offers a "Seasonality Adjustment" feature in the bid strategies portfolio. However, do not use this for a new account immediately. You need at least a week of stable data for the algorithm to calibrate. For the first month, stick to manual CPC or Enhanced CPC to maintain control while you gather data.