Sat Jan 05 16:02:51 PST 2019

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? If you do not have hundreds or thousands of inbound links into a
large, database-driven site, then only a small portion of your site is
likely to get indexed.
? If you have pages of limited content value, you may want to prevent
search engines from indexing them to save that link equity for indexing
more important content.
If you have a database-driven site with sensitive data, you may also want to change
the database error pages so it is harder for hackers to find their ways into your
database.
Content Management Systems
When debating what content management system to use, you may want to look to
see what various people say about how search engines index it. The following are a
few common problems with many content management systems:
? Many use the same content for the page title and heading tags. By
making these tags slightly different, you can rank for a broader set of
search terms while looking more like natural content rather than
optimized focused content.
? Many content management systems have problems with URLs, session
IDs, and cookies.
? Many content management systems do not allow you to add custom
fields for things like the meta description tag, and some place a single
meta description tag on all pages. Just about anything that is added to
a page that is not unique to that page lessens the likelihood people will
find it.
? Many content management systems are configured poorly so that the
site title and category paths are included in the page titles ahead of the
page-specific relevant content. You want the most relevant words
describing each page at or near the beginning of your page title.
URL Rewriting
If you are using an Apache server, you can use mod rewrite to write your
filenames and file paths as descriptive URLs. Microsoft servers also have custom
rewriting software solutions like ISAPI_Rewrite.
Wrong Server Status or Server Misconfigured
If you use a custom error script, make sure that the error page returns a 404 header
code. Also make sure your regular pages return a proper 200 series status code.
Another rare error is a misconfigured server clock. If search engines do not think a
document has changed since they last visited it, then some of them will not spider
the document again.