Webpage optimization and performance.
Several websites offer several services and result to analyze the various aspects of your websites such as loading time, minifying various coding aspect such as .css and .html as well as the number of requests. An important ranking factor in SEO is the loading speed and content optimization. As well as some aspect to indicate the end-user experience something that has become a more important ranking factor over time, this includes meta and title description and the structure of your website. The most important ranking factor to consider is that for Google since that yields the most traffic for your website but it is wise not to neglect the other search engines and take them into consideration.
- GTMetrix Weekly: GTMetrix
By far the most popular optimization and performance test on the web it will give you a good idea and what you need to improve on as well as providing a waterfall tab that shows in sequence how your site loads how much time it takes. What makes it even better is that you can test for PC and mobile devices from various location to test how your website will perform to a global audience.
- Gift of Speed: Website Speed Test & Performance Optimization Tools
Another optimization and performance test that also allows you to test from different locations but only for PC. They do offer a small selection of tools to use with their test so you can optimize on the fly.
- Google PageSpeed Insights: PageSpeed Insights
Straight from the source this test is from Google and will give you an indication of how you will do in ranking based on your website speed. Wise to use to compare to other tests if the results are roughly the same.
- Webpage Test: WebPageTest - Website Performance and Optimization Test
This test is much more granular than any of the other tests and allows for a wide selection of test locations as well as devices with a waterfall. Great for deep optimization of your website for SEO.