This step may seem like common sense, but you would be surprised how many live stores I've worked on, that were launched with many grammar/spelling errors and poor formatting. Building a Shopify store can take many hours, days, or even weeks. After a while, you start to get immune to content errors. Sometimes, all you need is to take a break and look at the site again later on. Other times, you may need a second pair of eyes to review the site for you.
This step doesn't have to be done by a Shopify expert. If possible, I recommend enlisting the help of a partner, friend, family member, co-worker, employee, or teacher - someone who has a good grasp of the English language - to go through the site and see if they can catch anything that you missed. You will always want the site to be perfect before it launches, and there's nothing worse than reading a product description full of misspelled words and poor formatting.
Please do not skip this step -- especially if English isn't your first language. Professionally written content can definitely make the difference between losing potential sales and gaining them.
Need more help with this step? Check out Shopify's grammar guide for more details & info by clicking here.