Google crawls websites regularly using bots to update its search index and refresh search results. While it does not provide a set schedule, Google typically updates its index every 3-4 months, resulting in 4-5 updates per year. The timing of updates is determined algorithmically based on factors like links, page rank, and technical constraints. Websites can request re-crawling by Google if changes have been made.
2. No one can really say...
Google simply states
that the bots crawl
regularly, and how
often Google crawls
your site is based on
links, page rank, and
crawling constraints
3. History of past updates can help
Google has typically updated every 3
to 4 months, which roughly translates
to 4-5 times a year.
If it has been a while since the last
Google update, you can expect one
soon.
4. Last updates of 2015
April 22nd (mobile update)
May 3rd (focused on checking quality)
So, it looks like you may
have some time before
another update.
5. Ask Google to re-Crawl your site
If you have made changes
to your URL, you can ask
Google to re-crawl it.
Before you do, make sure
there arent any rendering
errors.
Click here for the link.
You assist Google in finding
your content by creating
Sitemaps. Sitemaps are files for
Googlebots that contain your sites
pages. Click here for the link.
6. Googles Methodology
According to Googles Webmaster Tools page,
their little spiders regularly crawl web content to
update its grand index used to create the SERPs
(Search Engine Results Page).
These regular crawls result in changes to the
SERPs, which display soon after the index is
updated.
7. Googles Regular
Unfortunately, the crawl
process, according to Googles
webmaster, is algorithmic,
which means computers control
it and people arent in charge of
it.
8. Dont let updates affect you
The bottom line here is to not
make jumping higher in the
search results your main goal.
Focus on creating quality
content for users that answers
their questions.
9. Sources
Like what youve seen? Check out our blog at http://hdwebpros.com/blog/
All images courtesy of bplanet at FreeDigitalPhotos.net
Google update info from https://moz.com/google-algorithm-change