Beyond looking at pricing. The one thing we tell each client is that you can get traffic of all kinds but that does not mean it's the right traffic for your store. When our clients are looking to do paid ads on Google or Facebook. We recommend they start off on Google Shopping as you can target people based on what they are searching for. This means it's easier to get sales faster. You will need a Google Merchant Center and a Google Ads Account to run Google Shopping campaigns. After Google Shopping is working, we look at Facebook and setup a Dynamic Product Ads campaign on Facebook.
Google Merchant Center
This is where you host and manage your products (SKUs), so you can use Google Shopping campaigns in your Google Ads (AdWords) account. You can add the Google Shopping app to your store and connect it to your Google Merchant Center... once you do this, you are almost set to run Google Shopping campaigns.
Google Ads (AdWords) Account
This is where you run and manage your Google Shopping campaigns from. You will need to connect your Google Ads account to your Google Merchant Center account above. Once you do that, you can run Google Shopping campaigns. Make sure you turn on Auto-Tagging in your account. Also, you can link your Google Ads account with your Google Analytics account... this helps make sure data is shared between them. Hopefully you have setup your Google Analytics account already. Make sure your bids are not to high and you have a good account structure.
Facebook Ad Account
If you have not, you should Setup your Facebook Catalog. That way you can run Dynamic Product Ads (DPA), which is remarketing/retargeting on Facebook and Instagram. When someone comes to your site and does not buy... you can show them an ad later on Facebook and Instagram. The DPA campaigns are always the best return on ad spend for our clients. It's good to start with site visitors or people who have added something to their cart/started checkout but have not bought anything.
Once you have that setup. You can see what is working and what is not working and grow the business. The above assumes you have setup your Facebook pixel and your have a Google Ads Conversion tag setup for your site too. That way you can track your sales. Hope you found this helpful, if so please click "like" below to let me know