You should set a goal for Google Search Ads first. Then, you can name your campaign and choose the Google Search Network campaign. After that, you can target your audience by location and demographic, and set your budget for the Google Search Network campaign. Create your ad groups and build search ads that lean towards your business goals and targets. If you hire a Hong Kong SEM agency (such as us at R-Digital), they can help you calibrate your Google Search Network campaign to optimize your Google Search Ads.