In my opinion Google sandbox has always been or at least since 2004.
A very interesting topic because it explains why a new site is not able to get strong positions despite
excellent as you work without any mistakes.
Although it is an unofficial filter I personally find its presence in most of my new projects Google
sandbox is not intended as a real specific algorithm.
Google has always denied it but as a set of conditions that generate this effect unfortunately it does
not have a precise duration.
But I can say that its effects vary from a couple of months in the best cases to over seven months.
The reason for this phase is understandable because it allows new sites to have time to gain authority
through content and relationships with other sites in the same niche without being rewarded too easily.
This avoids that spammers and aggressive marketers with very little effort get positions and visibility
that they would not deserve.
Overcoming authoritative competitors who have been working in the industry for years.
If there is nothing to object about this point it must be also considered that a beginner not seeing
interesting results after a few months could easily become discouraged and give up on continuing the
project bypassing according to the most malignant to launch PPC campaigns and increasing big G's income.
Here is an example of my recent financial site.
You can see a significant increase in traffic after four months from launch despite the fact that no
link building or a content publication activity has been done.
In my experience I believe that the main factors that determine the presence or absence of the sandbox
are niche.
Some sectors are more sensitive because they are easy targets for aggressive marketers or spammers.
For example make money online or because they deal with sensitive topics.
For example medicine aggressiveness if you insert banner ads call to action and push a lot on monetization.
From day one poor content.
A blog with a few short articles and little content is unlikely to be considered immediately quality
of links.
Do not limit yourself to only having links from social networks but also look for authoritative sources
with the use of guest blogging or other link building methods.
As you may have noticed these are all features common to spammers too.
And this is the main reason why Google leaves new sites in a limbo for a few months.
In the meantime big G will be able to collect metrics on the user experience to verify legitimate projects
before offering excellent positions to the analyzed Web site.
To summarize If your site doesn't get results in the first six months of life it could just be a problem
with Google's sandbox.
You can't do much but just wait and persevere with SEO activities without getting discouraged.
On the other hand I believe there is always a limit.
And if after a year of work you don't see anything yet or you are very discouraged.
There may be other factors for example too competitive a niche which should make us desist from continuing
the project this approach of mine is often opposed by those who believe in.
If I do things right I will certainly be rewarded with experience.
We then realize that reality is very different.
We are not at school where commitment is rewarded and from a business perspective you have to consider
the time and money invested.