These Google tools can help you with your quest to grow your online store

1. Google Search Console
Google's webmaster tools offer a range of very useful tools as a website owner.  You can submit your Sitemap to Google, ask Google to Crawl your site, get reports of any errors on your site.  You can see an article here about managing your webmaster account regularly
 

Why use Search Console?

Monitor your site's performance in Google Search results:

    Make sure that Google can access your content
    Submit new content for crawling and remove content you don't want to be shown in search results
    Create and monitor content that delivers visually engaging search results
    Maintain your site with minimal disruption to search performance
    Monitor and resolve malware or spam issues so your site stays clean

Discover how Google Search—and the world—sees your site:

    Which queries caused your site to appear in search results?
    Did some queries result in more traffic to your site than others?
    Are your product prices, company contact info, or events highlighted in rich search results?
    Which sites are linking to your website?
    Is your mobile site performing well for visitors searching on mobile?

2. Google Analytics
No matter what your website does or offers you should use a tool like Google Analytics.  There are plenty of free options out there.  be sure the option you choose offers adequate training or support so you can understand the data you're reviewing.  Google Analytics actually has a beginners course and lots of articles to support using it.
I recommend setting some time aside and doing this.  Understanding this data on your site can mean the difference between a good website and a great one.  How you handle the data and make changes to your site can really alter the course of your website.  Flying blind is a bad idea.  And trusting a cheap SEO marketing company is a worse idea.  I have had quite a few business owners trust a cheap SEO company or marketing company with their website only to get a surge of sales and then blacklisted from all Search engines because they used shady methods to achieve a quick and fatal return.

3.Google My Business
If you are a business with a physical location that people can visit I strongly recommend setting up a "Google My Business" page.
Google will show these results usually ahead of other results.  They are based on location and keyword information.  So be sure you fill out the fields and describe your business in detail so that people can find you and understand what you are offering.