SEO

Maximum Length for Meta Description: A meta description is the short website summary.
25 words or 260 (or 255) but strive to closer to 150-160 characters because search engines ignore anything over.
   [Tip 0] Descriptions are written in sentence format. Capitalize the first letter of the sentence and all proper nouns.
   [Tip 1] Start the description with the company name followed by a verb (offers, provides, sells).
   [Tip 2] List the most important and relevant keywords in order of importance, with a limit of four to five keyword phrases.
   [Tip 3] End with a call to action like “free shipping” or “sign up for free”.

Maximum Length for Meta Title: 
66 characters or maximum of 12 keywords. (Google)
   [Tip 0] Don’t repeat the same keyword twice in the meta title tag.
   [Tip 1] Replace the words like “and”, “that” with “|” character.
   [Tip 2] Start the Keyword with primary keyword fallow secondary keywords. Primary Keyword - Secondary Keyword | Company Name or Company Name | Primary Keyword and Secondary Keyword

Maximum Length for Meta Keyword: Meta keywords are a list of keywords that pertain to a certain page.
A limit of 45 words in total or 500 characters.
   [Tip 0] Separate each keyword phrase with a comma and space.
   [Tip 1] Consider adding keyword mispellings or different common word spellings.

Special Characters

Configuration on MySQL Database for UTF-8 characters like non English characters: It's common practice that the MySQL configuration file, in *nix systems is located in /etc/mysql/my.cnf

[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
character-set-server = utf8
collation-server = utf8_general_ci