I'm working on some pages and found a table with several <th> tags (which are table header tags used for tables) and wanted to find out if these are beneficial for SEO. I know the the <h1>, <h2>, etc. tags are good for SEO. My plan is to replace the <th> with <h2> or <h3> because I know spiders put those into consideration for SEO for sure. Have anyone you looked into <th> and the possible effects on SEO? Thanks!