Practical Geriatric Assessment (PGA) Implementation Strategies and Correlative Evaluations (PACE-70)

For PGA Implementation Cohort, patients must meet the following criteria: 1. Age greater than or equal to 70 years. 2. Diagnosis of advanced or metastatic solid malignancy 3. Initiating a new line of palliative-intent systemic therapy with a prevalence of grade 3 toxicity exceeding 50%. For Correlative Analysis Cohort, patients must additionally meet the following criteria: 1. Must read and speak English and be able to fill out surveys 2. Ability to walk independently or with the use of an assistive device (e.g., walker, cane) 3. Consents to participate in correlative analysis cohort with Fitbit monitoring, body composition analysis, and self-report surveys 4. Have a smartphone able to operate with the Fitbit For PGA Implementation Cohort, there are no specific exclusion criteria other than not meeting inclusion criteria. For Correlative Analysis Cohort, patients will be excluded if meeting any of the following criteria: 1. Unable to effectively read and speak English 2. Reliance on a wheelchair, ECOG of 3 or above, clinically bedbound, or unable to walk without assistance every day for the past 7 days (ECOG 3 is confined to bed or chair for more than 50% of waking hours) 3. Concurrent enrollment in a therapeutic clinical trial (as clinical trials often have a substantial symptom-reporting structure). Non-therapeutic clinical trial enrollment is permitted 4. Lack of clinician consent to approach patient