Meta Title & Description in HTML

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I have edited my website's meta title and meta description on shopify (the one under online store>preference and also the ones at the bottom of every product page). But both title and description about my website in google search result appear differently, like the description is one of a sentence found in my footer. Should I add the title & description in the coding, like Html thing?

I am trying to improve my google search ranking as my website is super "quiet" right now, my position is like 25 or sometime, no one will ever scroll that down to visit my store. Can somebody help please....