My posts disappears from google

"Google bounce". (They're still there, but "further down" - they can gradually resurface, too.)

Gradually, eventually, perhaps. It's very slow, and that will depend on all the customary on-page and off-page SEO factors. The position of its initial appearance doesn't signify very much (and may be shown much higher in your browser than in others, too, because of your individualized browser-history).

You can read all about it in the SEO forum (where this thread also belongs and now lives): Search Engine Optimization

No - I wouldn't think so. Publishing content just on your own site isn't really a traffic-generation plan at all: the only traffic that's ever realistically going to bring you is a little gradual, eventual, search-engine traffic after all the ranking adjustments and balancing-out ... and many people find that, to put it mildly, it isn't typically very easy to monetize that, anyway. Using articles to attract traffic (known as "article marketing") involves publishing them in other highly relevant, highly targeted places, where the traffic you want to attract is already reading - it's not really an SEO strategy at all, and that's part of its strength and potential, as explained here: Your article writing ISN'T working! This is why:

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It should help if you take some of your post urls and post them on facebook, twitter and pinterest

Create a Youtube video and add your url in the description

Youtube Videos that make the first page of Google normally stay there for months, in most cases.

It will take some time for you to learn SEO

New site, you don't seem to know the basics of SEO.

Are you working on backlinks? Backlinks are very important to Google.

You can check the pages are indexed with this search in Google

site:domain.com

Will list everything Google currently has indexed.

David

It's due to freshness, Google will rank articles well for a day or two or even a couple of weeks and then lower the rankings after the freshness factor wears off.

You need LINKS and not more ARTICLES. A site without any quality links will not rank well. Period.

straight up advise, although I believe a good content is considered the heart of any site, but still, we need
supporting tools.