Frontend query and does not need to log in

I would like to query a post meta called 3-serial on the frontend page. Once queried, start_date and end_date will appear. I do not know where to put the codes too.

Answers:

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Method 1

First of all, please describe your question in detail or add the code that you have wrote, well
I am assuming that you have written the code for querying post meta.
If yes and by reading your question I believe that you just want to run the code only for frontend page.
if yes then you can use is_front_page().

Check this reference

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