Hi brook.
Thanks for your response and here is your answers:
1- but after just a short period of time, you are no longer ranking at all?
of course i get ranked. usually my new contents (or new pages) are showing in page 2 or 3 after one or two days of publishing! in fact i have a problem with 3 or 4 keywords at all.
3 or 4 very important and HARD competitive keywords. i got some ranks in the first place but after a while they were disappeared from the results for good!
some keywords like: خرید بلیط هواپیما , بلیط هواپیما , خرید بلیط ارزان هواپیما
(linked to page: https:://zomorodgasht.com/flights)
2- you have (from what I can tell) a very low domain authority
yeah unfortunately my domain is too much young (only 1 year) so there is a low DA / PA for this domain and my pages.
but i have some good quality backlinks (G web master tells more than 1,700 links backed to my site)
thanks for your help and i would be happy if you help me with the issue.
best regards