D'après les derniers messages de GoogleGuy sur WMW (GoogleGuy est un employé de Google intervenant dans le forum WMW), la sémantique fait désormais partie des nouveautés dans l'algo de Google.
Le stemming va également devoir être pris en compte... Exemple
Google a-t-il utilisé un filtre ou une sanction pour sur-optimisation ? Non semble-t-il, mais c'est tout comme, puisqu'il suffit de changer la pondération de l'importance de chaque critère dans l'algorithme. Par exemple on peut diminuer l'importance du titre ou des backlinks :
sources : http://www.webmasterworld.com/forum3/21994.htm
"Any clue as to the possible role greater reliance on semantics is playing in your never ending quest for more relevant results?"
I'd say that's inevitable over time. The goal of a good search engine should be both to understand what a document is really about, and to understand (from a very short query) what a user really wants. And then match those things as well as possible.Better semantic understanding helps with both those prerequisites and makes the matching easier.
Le stemming va également devoir être pris en compte... Exemple
à noter qu'il parle de la présence d'un mot-clé dans l'URL :roll:So a good example is stemming. Stemming is basically SEO-neutral, because spammers can create doorway pages with word variants almost as easily as they can to optimize for a single phrase (maybe it's a bit harder to fake realistic doorways now, come to think of it). But webmasters who never think about search engines don't bother to include word variants--they just write whatever natural text they would normally write. Stemming allows us to pull in more good documents that are near-matches. The example I like is [cert advisory]. We can give more weight to www.cert.org/advisories/ because the page has both "advisory" and "advisories" on the page, and "advisories" in the url. Standard stemming isn't necessarily a win for quality, so we took a while and found a way to do it better.
Google a-t-il utilisé un filtre ou une sanction pour sur-optimisation ? Non semble-t-il, mais c'est tout comme, puisqu'il suffit de changer la pondération de l'importance de chaque critère dans l'algorithme. Par exemple on peut diminuer l'importance du titre ou des backlinks :
"Has Google applied some sort of OOP or filter to the algorithm since the Florida update or was the drastic change in SERPs purely the result of new ranking criteria?"
It's the second one. People post around here about filters, blocking, penalties, etc. etc. A far better explanation is "things which used to work before don't receive the same amount of credit now." It's natural for people who are way out there with their linking strategies or their page-building strategies to think of a drop as an over-optimization penalty, but it's more realistic to conclude that Google is weighting criteria differently so that over-optimized sites just aren't doing as well now.
sources : http://www.webmasterworld.com/forum3/21994.htm