Sounds like you set up a brand new account and launched your first campaign, correct? If this is true, and you’re a beginner at google ads without knowledge of the CPCs you are going to expect, I would 100% say manual CPC bidding is a no go. Max clicks is best for new accounts/campaigns because it allows google to acquire all the data from the clicks you are getting, and better optimize your campaign down the road. I would keep it on max clicks for around 2 weeks, as this is the usual time for what we call “learning mode” for the algorithm. Assuming your business is targeting nationwide, your cpc’s can expensive. I’d also try and separate your ad groups by theme. If you have your whole business put into one ad group, you won’t be able to best optimize your campaign down the road. During these 2 weeks, keep an eye on your search terms coming in for these keywords, and negate unrelated terms, eventually you might want to negate terms that aren’t generating sales. After you’re out of learning mode, I’d recommend switching to max conversions. Once you have some knowledge about CPA and the amount you can expect to pay for each conversion, you can add a tCPA and adjust accordingly as time goes on. Also, what match type are you running for your keywords? As for search impression share, considering you are an e-commerce business targeting the US, you are going to have a lot of competition to go up against in your space. What locations are you currently targeting?