The rules for each engine ranking methods are always changing, and involve a number of factors. Below are three of the many reasons why your website may have poor ranking:

• No TITLE tag content
• High key-word density can be categorized as spamming
• Missing header and alt tag content

Site rankings are dependent on numerous factors, whose list and importance is consistently changing as Search Engines continue to innovate. Some of the factors are:

Targeted keyword phrases

• Industry competition
• Geographic extent of target market
• How efficiently site is tweaked for SEO optimization
• Inbound Links
• And many more!

If there was a single recommendation we could make to ensure you rank well on Google it would be to fill your website with lots of pages, of high quality, useful, informational, editorially independent content, stories, articles, & information. That doesn't mean contrived press releases about your latest money making venture, we're talking about informational content that has independent, useful value regardless of who it comes from. That is one of the most highly valued aspects of a website by the search engines. It's also very hard, time consuming & costly to create so here's a few other things you can do to get good rankings quickly given that for most people / companies, the aforementioned factors are tricky to generate quickly:
There are at least 150 different aspects of a website's technical construction and its profile on the internet that affect how well you rank in the "free listings" on Google. The short answer to this question however, is that mostly - the following things affect how you rank on the internet.
There are on-site" factors which are things about the HTML construction of your website, how your Meta tags are constructed, and how both the link structure and the content on your site are arranged that affect this. There are also "off-site" factors including which 3rd party websites have links pointing to your site, what text is used in those links and other issues. In summary, these are the some of the most important issues to consider:

On-site factors:

1. HTML < title > tags - must be unique on each page, relevant to that page, and containing words that people search on often on Google (keep in mind that < title > tags appear as the blue links in the search engine results page, so write these with a balance of keyword optimization and trying to convey a message that encourages users to click on your listing).
2. HTML < H1 > tags - these are "Heading 1" tags, and must follow the same principles, unique, containing keywords relevant to the content of that page, and matching the terms that people search for on the search engine.
3. Page Content - you should aim for a minimum of 20 - 30 pages on your website of keyword rich content of 300 - 500 words at least. You should include 5 - 6 occurrences of the important "two word" keyword phrases that you want to rank for and that people search for on Google. You should ensure a range of synonyms relating to the "theme" of that page are included in the page to clearly convey the purpose & meaning of that page to the search engines.
4. Meta description tags - these appear as the description under your main website link on the search engine results page, so while they are not critical for ranking, they are very important to convey a selling proposition or message that encourages users to click on your listing.
5. Link structure - ensuring that the links on the pages within your website (from menu's, headings, sitemaps etc) that link to other pages on your site, are setup in a way which ensures that any ranking or weighting which Google gives these web pages, is passed through into other pages within your website to maximize each page's changes of ranking well for various keyword terms.

1. You should aim to have as many one way, inbound links pointing to your website from 3rd party websites.
2. If possible, these links should be from websites which themselves are important or highly ranking, or educational or government institutions
3. Avoid "reciprocal linking" schemes where you exchange links with other websites, unless they are highly relevant to your website's target audience.
4. Ensure the link text in the link itself contains two keyword terms which you want to rank for.
5. Try to get links from websites that are related to the subject of the page which they are linking to.
6. Try to get links from pages which do not have hundreds of links pointing out to other websites i.e. pure "links" pages.
7. If you take care of these factors alone, your ranking will increase significantly over previous results.