I have been using TGStat in my work for a long time. This service helps me find channels for advertising, analyze their content, and study statistics, as well as search for competitors in my field. The database is quite extensive and includes not only Russian channels but also channels from Belarus, Kazakhstan, and other countries. The convenient categorization helps find channels by topics and view selections in different directions, although it's not available for all themes. For each channel, you can see statistics, including data on audience growth and decline, mentions in other channels, reach, and other metrics. This really helps in choosing the most effective advertising platforms. The same goes for my competitors in the niche, whom I track. The service provides accurate data and has never let me down.