Semrush is a marketing suite rather than a single-purpose SEO tool. Alongside keyword research, rank tracking, backlink analysis and site auditing, it covers paid search research, display advertising, social media scheduling and analytics, content optimisation, local listings management and PR monitoring. That breadth is the product thesis: one subscription instead of five, and one place where the organic and paid pictures sit side by side.
The competitive research is the part most people demonstrate first. Enter a competitor's domain and you get estimated organic traffic, the keywords producing it, the pages responsible, their paid keywords, their ad copy, and how all of it has moved over time. For paid search in particular the ad history is unusually valuable, because it shows what a competitor has been willing to keep spending on, which is a stronger signal than what they say in a case study.
The Keyword Magic Tool generates large keyword sets with volume, difficulty, intent classification and SERP features, and the intent labelling is genuinely useful for separating people who want to buy from people who want to learn. Position Tracking follows rankings daily across locations and devices. Site Audit checks well over a hundred technical issues and, importantly, explains why each matters, which makes it usable by someone who is not an SEO specialist. The Content Template and SEO Writing Assistant produce briefs and score drafts against what is currently ranking.
The drawbacks. It is expensive, and the pricing structure has a sting: core plans include a limited number of tracked keywords and projects, and several capabilities that feel like they should be included are add-ons charged separately, so the real monthly cost is often well above the headline. Seats are limited and extra users cost more. The interface is dense and sprawling, and new users routinely use a fraction of what they are paying for. And as with every tool in this category, the traffic and difficulty figures are modelled estimates, not measurements, and should be treated as relative rather than absolute.
Who it suits: agencies and marketing teams running both organic and paid campaigns who will genuinely use the breadth. Who should look elsewhere: specialists who only need backlink data, and small teams for whom the cost outweighs the parts they will use.