If you notice your site is taking a long time to load, then you should first use PageSpeed Insights to see what can quickly be optimized (also check your file sizes, hosting server, NGINX and other common sources of slow speed, too.) And, if you've notice gradually fewer Organic Search visits, PageSpeed Insights might be able to help. As Google is reducing the prevalence of slow sites, you could be losing traffic. Speed up your page load times by finding what is blocking renders, slowing down contentful paints, and other critical page speed signals.
Screaming Frog tracks the crawl level, internal links, outbound links, title tags, and meta descriptions of the pages it crawls. It also adds HTTP status codes, title tag length, meta description length, H1, H2 tags and lengths, and canonical tags. Many of these elements are also broken into their own tabs at the top so that you can easily focus in on problem areas. You can right-click on any URL for many more options. The program is definitely valuable to anyone who is looking to gauge factors regarding SEO. However, if you are not a web designer/admin, you're going to lack an understanding of the information it provides.
The tool has become integrated into our teams daily workings and I have yet to find a tool other than scremaing frog to replicate all of our use cases for it. It's a great tool and we're sticking with it
Easy for me to use because I have using the product for a long time and understand the ins and outs of it. If I was a newbie, I would be completely lost. It does take some prior knowledge to operate this software and understanding of what a crawl means
Screaming Frog is a relatively primitive system, and doesn't need to be supported by devs or other software. Screaming Frog does interface directly with some programs that are most needed (Google Analytics, Search Console, Page Speed Insights), so that's convenient. It isn't widely supported by other programs, but it also doesn't need to be.
I think GTmetrix has some feedback that PageSpeed doesn't provide, but Google's tool is easier overall and has a better user experience; also offers compressed images, CSS, and javascript files if that's the case. Also, Google has extensive documentation to help you better understand what can be done to improve your grade.
Screaming Frog SEO Spider is probably the best non-client facing SEO audit tool in terms of technical SEO. There are other tools on the market that do a more complete job of keyword tracking, competitive analysis, and backlink profiles...however, for analyzing the technical SEO health of any website, Screaming Frog is the best
Increased employee efficiency - We spend many less hours tracking down and reporting simple meta tags.
Better Client Servicing - We are able to ensure we have a total look at a client's site before we recommend anything.
True Pricing Structure - We are able to more accurately predict how much help a client may need based on factors such as size of site, number of redirects, proper use of meta tags, etc.