You often hear that each social bookmarking site is different, and it’s best to focus your content on the social bookmarking platform that values that type of content most. Good plan. But how do the different sites value content?

SocialMediaTrader did an analysis of 500 front-page articles from February, 2008, for several different popular social bookmarking sites. The sample size isn’t huge, but results could give you a guideline of the best sites to bookmark your content.

February, 2008 # of Front-Page Stories

StumbleUpon

1. Technology 105
2. Offbeat 93
3. Arts 73
4. Politics  47
5. Lifestyle 48
6. Science 25
7. Videos 24
8. Tutorial 20
9. News 18
10. Business/Make money 17
11. Environment 15

DIGG

1. US Elections 44
2. Tech News  34
3. World News  32
4. General Sciences 30
5. Odd Stuff  28
6. Environment 27
7. Politics  27
8. Comedy 25
9. Movies  24
10. Business 22

Del.icio.us

1. Technology 51%
2. Offbeat 12%
3. Arts 9%
4. Tutorial 7%
5. Business 6%
6. Lifestyle 6%
7. Politics 3%
8. Science 2%
9. Videos 2%
10. Environment 1%

Propeller

1. Politics 68
2. News 63
3. Technology 57
4. Health 48
5. Money 37
6. Humor 25
7. Celebrities 23
8. Do No Evil 21
9. Science 20
10. Personals 14
11. Music 11

MIXX

1. Entertainment 64
2. Politics 59
3. Informative 53
4. Tech 23
5. Business 21
6. Lifestyle 20
7. Other 19
8. Education 13

These stats give you an idea of what each community is looking for, and should give you a start on finding the 1 or 2 sites that give you your best chance of submitting your own niche content that goes viral.