How to strengthen and improve the seo? of articles

I use mariaDB and php to write the article system ~
just how to strengthen and improve the article seo
I put meta og:. in each article. Code of the series
do you have any other skills or improvements that can be improved
is to make the article easier to find ~
ps my article is in Chinese web address

Php7 php seo
Feb.28,2021

ensures that every page has a title, keywords, description, and a page link with an alt tag, which is the most basic SEO optimization.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32a4b-2b67a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32a4b-2b67a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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