Google released their new monthly update on the changes they made to Google search engine over the past month. It is really great that Google does this and this time they shared 52 changes for April. Below are some important ones.
Penguin Related:
- Anchors bug fix
- Keyword stuffing classifier improvement
- More authoritative results
- Improvement in a freshness signal
- No freshness boost for low-quality content
- Improvements to how search terms are scored in ranking
Ranking Changes:
·
Improvement in a freshness signal. [launch codename
"citron", project codename "Freshness"] This change is a
minor improvement to one of the freshness signals which helps to better
identify fresh documents.
·
No freshness boost for low-quality content. [launch codename
"NoRot", project codename "Freshness"] We have modified a
classifier we use to promote fresh content to exclude fresh content identified
as particularly low-quality.
·
Smoother ranking changes for fresh results. [launch codename
"sep", project codename "Freshness"] We want to help you
find the freshest results, particularly for searches with important new web
content, such as breaking news topics. We try to promote content that appears
to be fresh. This change applies a more granular classifier, leading to more
nuanced changes in ranking based on freshness.
·
Improvements to how search terms are scored in ranking. [launch
codename "Bi02sw41"] One of the most fundamental signals used in
search is whether and how your search terms appear on the pages you're
searching. This change improves the way those terms are scored.
·
Backend improvements in serving. [launch codename
"Hedges", project codename "Benson"] We've rolled out some
improvements to our serving systems making them less computationally expensive
and massively simplifying code.
·
Keyword stuffing classifier improvement. [project codename
"Spam"] We have classifiers designed to detect when a website is
keyword stuffing. This change made the keyword stuffing classifier better.
·
More authoritative results. We've tweaked a signal we use to
surface more authoritative content.
Link Analysis Changes:
·
Anchors bug fix. [launch codename "Organochloride",
project codename "Anchors"] This change fixed a bug related to our
handling of anchors.
Index Updates:
·
Increase base index size by 15%. [project codename
"Indexing"] The base search index is our main index for serving
search results and every query that comes into Google is matched against this
index. This change increases the number of documents served by that index by
15%. *Note: We're constantly tuning the size of our different indexes and
changes may not always appear in these blog posts.
·
New index tier. [launch codename "cantina", project
codename "Indexing"] We keep our index in "tiers" where
different documents are indexed at different rates depending on how relevant
they are likely to be to users. This month we introduced an additional indexing
tier to support continued comprehensiveness in search results.
Search Listings:
·
More domain diversity. [launch codename "Horde",
project codename "Domain Crowding"] Sometimes search returns too many
results from the same domain. This change helps surface content from a more
diverse set of domains.
·
Categorize paginated documents. [launch codename
"Xirtam3", project codename "CategorizePaginatedDocuments"]
Sometimes, search results can be dominated by documents from a paginated
series. This change helps surface more diverse results in such cases.
·
Country identification for webpages. [launch codename
"sudoku"] Location is an important signal we use to surface content
more relevant to a particular country. For a while we've had systems designed
to detect when a website, subdomain, or directory is relevant to a set of
countries. This change extends the granularity of those systems to the page
level for sites that host user generated content, meaning that some pages on a
particular site can be considered relevant to France, while others might be
considered relevant to Spain.
·
Disable salience in snippets. [launch codename "DSS",
project codename "Snippets"] This change updates our system for
generating snippets to keep it consistent with other infrastructure
improvements. It also simplifies and increases consistency in the snippet
generation process.
·
More text from the beginning of the page in snippets. [launch
codename "solar", project codename "Snippets"] This change
makes it more likely we'll show text from the beginning of a page in snippets
when that text is particularly relevant.
·
Tweak to trigger behavior for Instant Previews. This change
narrows the trigger area for Instant Previews so that you won't see a preview
until you hover and pause over the icon to the right of each search result. In
the past the feature would trigger if you moused into a larger button area.
·
Better query interpretation. This launch helps us better
interpret the likely intention of your search query as suggested by your last
few searches.
·
News universal results serving improvements. [launch codename
"inhale"] This change streamlines the serving of news results on
Google by shifting to a more unified system architecture.
·
More efficient generation of alternative titles. [launch
codename "HalfMarathon"] We use a variety of signals to generate
titles in search results. This change makes the process more efficient, saving
tremendous CPU resources without degrading quality.
·
More concise and/or informative titles. [launch codename
"kebmo"] We look at a number of factors when deciding what to show
for the title of a search result. This change means you'll find more
informative titles and/or more concise titles with the same information.
·
"Sub-sitelinks" in expanded sitelinks. [launch
codename "thanksgiving"] This improvement digs deeper into
megasitelinks by showing sub-sitelinks instead of the normal snippet.
·
Better ranking of expanded sitelinks. [project codename
"Megasitelinks"] This change improves the ranking of megasitelinks by
providing a minimum score for the sitelink based on a score for the same URL
used in general ranking.
·
Sitelinks data refresh. [launch codename "Saralee-76"]
Sitelinks (the links that appear beneath some search results and link deeper
into the site) are generated in part by an offline process that analyzes site
structure and other data to determine the most relevant links to show users.
We've recently updated the data through our offline process. These updates
happen frequently (on the order of weeks).
·
Less snippet duplication in expanded sitelinks. [project
codename "Megasitelinks"] We've adopted a new technique to reduce
duplication in the snippets of expanded sitelinks.
Local Changes:
·
More local sites from organizations. [project codename
"ImpOrgMap2"] This change makes it more likely you'll find an
organization website from your country (e.g. mexico.cnn.com for Mexico rather
than cnn.com).
·
Improvements to local navigational searches. [launch codename
"onebar-l"] For searches that include location terms, e.g. [dunston
mint seattle] or [Vaso Azzurro Restaurant 94043], we are more likely to rank
the local navigational homepages in the top position, even in cases where the
navigational page does not mention the location.
·
More comprehensive predictions for local queries. [project
codename "Autocomplete"] This change improves the comprehensiveness of
autocomplete predictions by expanding coverage for long-tail U.S. local search
queries such as addresses or small businesses.
Images & Videos:
·
Improvements to SafeSearch for videos and images. [project
codename "SafeSearch"] We've made improvements to our SafeSearch
signals in videos and images mode, making it less likely you'll see adult
content when you aren't looking for it.
·
Improved SafeSearch models. [launch codename
"Squeezie", project codename "SafeSearch"] This change
improves our classifier used to categorize pages for SafeSearch in 40+
languages.
And here are some other changes blogged about since last time:
Source