| General Indexing Guidelines (一般索引准则) |
Search Engine
(搜索引擎) |
Google
(谷歌) |
Yahoo
(雅虎) |
Microsoft Live
(微软) |
Ask |
| Title Characters Indexed |
1129 |
153 |
70 |
374 |
| Title Characters displayed in SERPs |
65 |
115 |
82 |
65 |
| Title Tag Importance |
Very High |
High |
High |
High |
| Meta Description Characters Indexed |
155 |
400 |
207 |
147 |
| Meta Description Used in SERPs? |
Yes |
Only with paid inclusion |
No |
Yes |
| Meta Description Characters Displayed in SERPs |
156 |
169 |
200 |
112 |
| Meta Description Importance |
Low |
Low |
Low |
Low |
| Keyword Meta Tag Indexed |
No |
Yes |
No |
Yes |
| Keyword Meta Tag Characters Indexed |
None |
1129 |
None |
1129 |
| Keyword Meta Tag Importance |
None |
Small |
None |
Small |
| Meta Redirect Considered Spam |
Likely , don’t use |
Likely |
Likely |
Likely |
| Meta Robot Tags Supported |
noindex, nofollow, noodp |
noindex, nofollow, noydir |
noindex, nofollow |
noindex, nofollow |
| Robots.txt Supported |
Yes |
Yes |
Yes |
Yes |
| Body Text Indexed On Page |
No Limit as long as you’ve got good links |
Up to ~500k |
Up to ~102k |
Up to ~102k |
| Body Text Importance |
High |
Very High |
High |
High |
| Frames Indexed |
Yes |
Yes |
Yes |
Yes |
| NoFrames Content Indexed |
Yes |
Yes |
Yes |
Yes |
| Dynamic URLs Indexed |
Yes |
Yes |
Yes |
Yes |
| Flash Indexed |
Partially |
No |
No |
No |
| PDFs Indexed |
Yes |
Yes |
Yes |
Yes |
| Image Map Links Followed |
Yes |
Yes |
Yes |
Yes |
| Time From Submission To Indexing |
1-2 weeks |
2-4 weeks |
2-4 weeks |
No |
