SEO Technique which were running at their peak back 5-6 years ago are old school techniques.
But these SEO services/techniques are not powerful today as they used to be, but still you might be using them.
Search engines are evolving very fast. Every now and then algorithms are changing and good old search engine optimization practices stop working.
Hope your SEO services provider is not using these old techniques.
Check this list of antique and old fashion SEO technique that some of us still practice at present.
1. Using Meta Keywords.
This one deserves the first place. A lot of experts who think high of Meta data and Meta keywords will help your site rank higher. Not at all, they won't. The only piece of Meta data that should be paid attention to is title tags, that's it.
2. Submitting to search engines
Search engine submission. If somebody says to you to submit your site to 800 different search engines, don't fall for that. Instead of Search engine submission, focus on link building. That is do bookmarking on different sites.
3. Depend on H1 tags for high rankings
It is true that using your major keywords in heading can boost your ranking. But lots of services providers tag those keywords from H1-H6. Tagging these many headings does not make any difference for search engines.
4. Commenting in Blogs & Forum
Commenting in blogs and forum back in 2011-12 used to work for building backlinks, but now you can't just be reliable on commenting, there are lot of many other Digital Marketing techniques (social bookmarking, blog submission, internal link building) for creating backlinks.
5. Not making use of analytical data
Some SEO companys still think that tracking page views, conversion rates or sales is not their department. They may not be wrong, but measuring these will let you know where your efforts are missing & you must know what helps & kills your conversion.