What is the best definition of Search engine optimisation-SEO?

Search engine optimisation (SEO) is the act of pushing your website up the search engine ladder so it can be found easily and produce more traffic.

SEO consists of  methods:

On-page SEO―a manipulation of the web code and content.

Off-page SEO―obtaining traffic and backlinks from other platforms in cyberspace.

Here is a list of search engines around the world:

By content/topic

General

NameLanguageBackend ownership 
Ask.comMultilingualGoogle  
BaiduChineseBaidu  
Brave SearchMultilingualBrave  
DogpileEnglishMetasearch engine 
DuckDuckGoMultilingualMicrosoft Bing  
EcosiaMultilingualMicrosoft Bing  
ElasticsearchMultilingualApache 2.0 until 2021, then Elasticsearch 
ExaleadMultilingualCloudview  
ExciteMultilingualMicrosoft Bing  
GigablastEnglishApache License 2.0 
GoogleMultilingualGoogle  
HotBotEnglishMicrosoft Bing  
LycosMultilingualMicrosoft Bing  
MetaCrawlerEnglishMetasearch engine 
Microsoft BingMultilingualMicrosoft Bing  
MojeekMultilingualMojeek  
OpensearchMultilingualApache License 2.0 (Elasticsearch fork) 
PetalMultilingualHuawei  
QwantMultilingualMicrosoft Bing  
SearxMultilingualMetasearch engine 
SogouMultilingualTencent  
StartpageEnglishGoogle  
SwisscowsMultilingualMicrosoft Bing  
WebCrawlerEnglishMicrosoft Bing  
YaCyMultilingualGPL-2.0-or-later 
Yahoo! SearchMultilingualMicrosoft Bing  
YandexMultilingualYandex  
YoudaoChineseNetEase  
You.comEnglishMicrosoft Bing  

† Main website is a portal

Geographically localised

NameLanguageCountry
AccoonaChineseEnglishChinaUnited States
BiglobeJapaneseJapan
DaumKoreanKorea
NateKoreanKorea
EgerinKurdishKurdistan (Bing backend[citation needed])
FireballGermanEnglishGermany
GooJapaneseJapan
Leit.isIcelandicEnglishIceland
MaktoobArabicEnglishArab World
Miner.huHungarianHungary
Najdi.siSlovenianSlovenia
NaverKoreanKorea
ParsijooPersianIran
PipilikaBengaliEnglishBangladesh
RamblerRussianRussia
RediffIndia
Search.chSwitzerland
SesamNorwaySweden
SeznamCzechCzech Republic
Walla!Israel
Yahoo! JapanJapaneseJapan (Google backend)
YongzinTibetanChina
ZipLocalEnglishCanadaUnited States
QmamuEnglishHindiIndia

Do make sure all tactics and means in use would create synergy with your G-POST. Or else you might jeopardise it all. For more information, visit Jon Ane, The Rosetta Stone of Strategy.

G-POST STRATEGY TOOL – strategy’s traffic light – Jon Ane, The Rosetta Stone of Strategy.
G-POST STRATEGY TOOL – strategy’s traffic light – Jon Ane, The Rosetta Stone of Strategy.

G-POST STRATEGY TOOL – strategy’s traffic light – Jon Ane, The Rosetta Stone of Strategy.