When you create your Google ad campaign keep it simple. If your business is small choose to advertise locally. What about the format. I suggest it should be formatted for all screens. There are a big variety of electronics out there and you might not know what kind of electronics your potential customer would use. You can choose automatic bidding. If you are starting your business keep your daily budget low and raise the amount if you feel the need.
When preparing a Google Ads campaign keep it in mind that it is a collection of keywords and their ads. You need to go to Google Ads Key word planner and write about your business and be specific. If your business is about selling sunglasses. Be specific about the words you want to put down on the option for keywords suggestion. Keep all the words together on your ad group. Be careful not to use bad keywords. If you want to sell sunglasses you need to make sure to add in the bad word box eyeglasses or prescription glasses. Doing this if you are choosing what not to target with your Ad campaign. Choose fewer negative keywords or your ad will reach a small number of customers.