Direct answer
Every claim is sourced below
Tools are useful in growth-driven design for four jobs: keeping the plan, its owners and the discussion in one place, watching what visitors do, comparing two versions of a page, and recording what was decided. A work manager such as Asana, or a shared document, can hold the plan and the record. Microsoft Clarity records sessions and draws heatmaps. HubSpot's page A/B test splits visitors between two versions, on Content Hub Professional or Enterprise. A team doesn't need all of them to start, and some changes go ahead without a split test.