Conversions - Whats Going Wrong In Checkout?

They are probably seeing something there that they did not expect, such as shipping charges. It could be other things, too, like they do not like your payment method(s).

Is it a Shopify or what?

Stand-alone websites aren't just going to start making
sales after only 30 days.

Are you selling something unique or is it something
that dozens/hundreds of other people are selling, or
something that can be found all over the place, llke
that light bulb camera thing that everybody is selling
now. Or something similar.

And I hate to criticize people for typos, because we all
make them but your post has numerous errors which
you should have corrected before starting a thread.

For example ad (an advertisement) and add (adding
things to your cart) are two different words.

If that is any indicator of the way you run your business
then that may be the reason people lack confidence in
completing a transaction on your site.

You don't want people wondering whether you will get
their address correct on their shipping label.

My suggestion to you is, if you have a unique product
that there is a market for, then sell it on a marketplace
platform such as Etsy, eBay, Amazon or somewhere
that is already established, instead of trying to make
sales on your own website.

What is important is that you make money, not that
you have a website.

People tends to abandon an online purchase during the checkout process due to extra fees or delivery charges. It's completely important to be transparent about your website checkout process. Do you have marketing strategy for your website, will you mind me sharing my marketing strategy to significantly boost your store sales?

You have identified the problem but have you tried tweaking and testing it yet ?Are you aware that you can use an ads grader to help you improve your ads performance ?

Thread is from October and OP has not returned since then.