Dementia is the most common disease in older individuals and this century's biggest healthcare challenge. Many patients who visit the memory clinic with memory complaints do not have dementia but instead are diagnosed with mild cognitive impairment (MCI) or subjective cognitive decline (SCD). MCI or SCD may be a pre-dementia stage. Many patients with MCI or SCD often leave their consultation with unanswered questions, and unsure what they, themselves can do to reduce dementia risk. Patients with MCI and SCD have a heightened risk of developing dementia. Therefore, this group would possibly benefit most from preventive strategies. Around 40% of dementia cases is attributable to modifiable factors. Thus, managing a healthy lifestyle may reduce dementia risk. To answer the information request many patients have when leaving the memory clinic and to fill the knowledge gap an online tool has been developed. The goal of this mixed-method feasibility study is to investigate the usability, feasibility, patient experience, and effectiveness of the personalized, multi-domain online website in older adults with MCI or SCD. The main questions it aims to answer are: * Is the new website being used by the target population? * How does the target population experience the use of the website? * What is the effect of using the website? Participants will have access to the website and are free to use the website in any way they want.