A variety of research & scholarly impact metrics are available, with guides to the most common available here.
Information on additional metrics may be found at the Metrics Toolkit and Snowball Metrics sites.
Using best practices can increase citation rates.
Studies suggest 5 ways to increase citation counts, Nature Index, Aug, 2019
Citation Best Practices, Washington State University
Journalytics Medicine & Predatory Reports - published by Cabells, this database of over 7,000 verified medical journals and 17,000 predatory journals includes Altmetric Attention Scores and Smart Citations, among other details.
Please note that while coverage is constantly growing, it is not comprehensive. For example, if a journal is not included in Journalytics Medicine, that doesn't mean it isn't high-quality; it may be that Cabells considers it outside of the scope of this database. For further assistance, feel free to reach out to a librarian.