To begin with, you need to understand what affects the result most often:
- is the selected rate and budget for the project (it should be understood that the cost includes the purchase of links, it directly affects the result of extradition)
- the speed of indexing pages, and adaptivity in all devices (when drawing up TS for the programmer or recommendations for the site, you should pay attention to them)
- this site's position in the search engine (the site can fall or stand still, or slowly grow)
- competition (it is necessary to understand common sense, we cannot bypass the big portals for example : Rosetka, Avito, Azamon ...)
- site theme (there are "gray" topics, they are more difficult to promote. For example: fortune-telling, bookmakers, credits, alcohol ...)
If average very much, after 4-6 months some of the queries are already in the TOP-10. It may be earlier or later, all depends on many of the factors mentioned above.