What are those Grade means? Sahih (Darussalam)

For Hadith, What are those Grade means? Often they are shown like not only Sahih or Daif. How to understand the hadith is weak or 100% sahih or medium sahih? How do you verify a hadith if weak is or no doubt (what is easier method?)

Sahih (Darussalam)
Sahih
Sahih. Its isnad is jayyid
Sahih lighairihi because of corroborating reports (Darussalam)

Da'if (Darussalam)
Hasan Darussalam
Hasan (35), Sahih (36)

Reading from: https://sunnah.com/